Linux web-conference.aiou.edu.pk 5.4.0-204-generic #224-Ubuntu SMP Thu Dec 5 13:38:28 UTC 2024 x86_64
Apache/2.4.41 (Ubuntu)
: 172.16.50.247 | : 18.226.170.52
Cant Read [ /etc/named.conf ]
7.4.3-4ubuntu2.28
appadmin
www.github.com/MadExploits
Terminal
AUTO ROOT
Adminer
Backdoor Destroyer
Linux Exploit
Lock Shell
Lock File
Create User
CREATE RDP
PHP Mailer
BACKCONNECT
UNLOCK SHELL
HASH IDENTIFIER
CPANEL RESET
CREATE WP USER
BLACK DEFEND!
README
+ Create Folder
+ Create File
/
usr /
share /
doc /
nodejs-doc /
api /
[ HOME SHELL ]
Name
Size
Permission
Action
assets
[ DIR ]
drwxr-xr-x
addons.html
53.67
KB
-rw-r--r--
addons.md.gz
9.8
KB
-rw-r--r--
all.html
3.13
MB
-rw-r--r--
assert.html
69.81
KB
-rw-r--r--
assert.md.gz
8.17
KB
-rw-r--r--
async_hooks.html
45.55
KB
-rw-r--r--
async_hooks.md.gz
8.19
KB
-rw-r--r--
buffer.html
157.61
KB
-rw-r--r--
buffer.md.gz
16.99
KB
-rw-r--r--
child_process.html
111.13
KB
-rw-r--r--
child_process.md.gz
13.71
KB
-rw-r--r--
cli.html
47.44
KB
-rw-r--r--
cli.md.gz
7.5
KB
-rw-r--r--
cluster.html
46.91
KB
-rw-r--r--
cluster.md.gz
7.48
KB
-rw-r--r--
console.html
38.66
KB
-rw-r--r--
console.md.gz
4.73
KB
-rw-r--r--
crypto.html
212.4
KB
-rw-r--r--
crypto.md.gz
20.62
KB
-rw-r--r--
debugger.html
15.25
KB
-rw-r--r--
debugger.md.gz
2.33
KB
-rw-r--r--
deprecations.html
101.97
KB
-rw-r--r--
deprecations.md.gz
11.03
KB
-rw-r--r--
dgram.html
46.05
KB
-rw-r--r--
dgram.md.gz
6.51
KB
-rw-r--r--
dns.html
86.31
KB
-rw-r--r--
dns.md.gz
8.27
KB
-rw-r--r--
documentation.html
11.69
KB
-rw-r--r--
documentation.md
3.66
KB
-rw-r--r--
domain.html
27.43
KB
-rw-r--r--
domain.md.gz
5.45
KB
-rw-r--r--
errors.html
164.88
KB
-rw-r--r--
errors.md.gz
20.08
KB
-rw-r--r--
esm.html
17.08
KB
-rw-r--r--
esm.md.gz
2.82
KB
-rw-r--r--
events.html
43.87
KB
-rw-r--r--
events.md.gz
5.46
KB
-rw-r--r--
fs.html
330.85
KB
-rw-r--r--
fs.md.gz
28.03
KB
-rw-r--r--
globals.html
15.24
KB
-rw-r--r--
globals.md.gz
1.24
KB
-rw-r--r--
http.html
124.8
KB
-rw-r--r--
http.md.gz
17.74
KB
-rw-r--r--
http2.html
209.44
KB
-rw-r--r--
http2.md.gz
25.84
KB
-rw-r--r--
https.html
26.25
KB
-rw-r--r--
https.md.gz
3.5
KB
-rw-r--r--
index.html
8.81
KB
-rw-r--r--
index.md
1.57
KB
-rw-r--r--
inspector.html
17.34
KB
-rw-r--r--
inspector.md.gz
2.23
KB
-rw-r--r--
intl.html
20.58
KB
-rw-r--r--
intl.md.gz
3.53
KB
-rw-r--r--
modules.html
48.55
KB
-rw-r--r--
modules.md.gz
9.04
KB
-rw-r--r--
n-api.html
247.99
KB
-rw-r--r--
n-api.md.gz
32.48
KB
-rw-r--r--
net.html
82.9
KB
-rw-r--r--
net.md.gz
9.86
KB
-rw-r--r--
os.html
53.19
KB
-rw-r--r--
os.md.gz
7.37
KB
-rw-r--r--
path.html
32.74
KB
-rw-r--r--
path.md.gz
3.75
KB
-rw-r--r--
perf_hooks.html
31.93
KB
-rw-r--r--
perf_hooks.md.gz
3.18
KB
-rw-r--r--
process.html
118.78
KB
-rw-r--r--
process.md.gz
19.76
KB
-rw-r--r--
punycode.html
14.66
KB
-rw-r--r--
punycode.md.gz
1.46
KB
-rw-r--r--
querystring.html
16.92
KB
-rw-r--r--
querystring.md.gz
1.79
KB
-rw-r--r--
readline.html
39.12
KB
-rw-r--r--
readline.md.gz
5.64
KB
-rw-r--r--
repl.html
38.59
KB
-rw-r--r--
repl.md.gz
6.95
KB
-rw-r--r--
stream.html
150.27
KB
-rw-r--r--
stream.md.gz
23.02
KB
-rw-r--r--
string_decoder.html
12.16
KB
-rw-r--r--
string_decoder.md
2.75
KB
-rw-r--r--
synopsis.html
9.93
KB
-rw-r--r--
synopsis.md
2.69
KB
-rw-r--r--
timers.html
22.62
KB
-rw-r--r--
timers.md.gz
2.48
KB
-rw-r--r--
tls.html
106.34
KB
-rw-r--r--
tls.md.gz
17.93
KB
-rw-r--r--
tracing.html
16.44
KB
-rw-r--r--
tracing.md.gz
2.03
KB
-rw-r--r--
tty.html
20.34
KB
-rw-r--r--
tty.md.gz
2.39
KB
-rw-r--r--
url.html
76.68
KB
-rw-r--r--
url.md.gz
10.63
KB
-rw-r--r--
util.html
128.5
KB
-rw-r--r--
util.md.gz
13.97
KB
-rw-r--r--
v8.html
33.74
KB
-rw-r--r--
v8.md.gz
3.86
KB
-rw-r--r--
vm.html
72.43
KB
-rw-r--r--
vm.md.gz
9.85
KB
-rw-r--r--
worker_threads.html
35.04
KB
-rw-r--r--
worker_threads.md.gz
5.06
KB
-rw-r--r--
zlib.html
74.5
KB
-rw-r--r--
zlib.md.gz
7.2
KB
-rw-r--r--
Delete
Unzip
Zip
${this.title}
Close
Code Editor : cli.html
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>Command Line Options | Node.js v10.19.0 Documentation</title> <link rel="stylesheet" href="assets/style.css"> <link rel="stylesheet" href="assets/sh.css"> <link rel="canonical" href="cli.html"> </head> <body class="alt apidoc" id="api-section-cli"> <div id="content" class="clearfix"> <div id="column2" class="interior"> <div id="intro" class="interior"> <a href="/" title="Go back to the home page"> Node.js </a> </div> <ul> <li><a class="nav-documentation" href="documentation.html">About these Docs</a></li> <li><a class="nav-synopsis" href="synopsis.html">Usage & Example</a></li> </ul> <div class="line"></div> <ul> <li><a class="nav-assert" href="assert.html">Assertion Testing</a></li> <li><a class="nav-async_hooks" href="async_hooks.html">Async Hooks</a></li> <li><a class="nav-buffer" href="buffer.html">Buffer</a></li> <li><a class="nav-addons" href="addons.html">C++ Addons</a></li> <li><a class="nav-n-api" href="n-api.html">C/C++ Addons - N-API</a></li> <li><a class="nav-child_process" href="child_process.html">Child Processes</a></li> <li><a class="nav-cluster" href="cluster.html">Cluster</a></li> <li><a class="nav-cli active" href="cli.html">Command Line Options</a></li> <li><a class="nav-console" href="console.html">Console</a></li> <li><a class="nav-crypto" href="crypto.html">Crypto</a></li> <li><a class="nav-debugger" href="debugger.html">Debugger</a></li> <li><a class="nav-deprecations" href="deprecations.html">Deprecated APIs</a></li> <li><a class="nav-dns" href="dns.html">DNS</a></li> <li><a class="nav-domain" href="domain.html">Domain</a></li> <li><a class="nav-esm" href="esm.html">ECMAScript Modules</a></li> <li><a class="nav-errors" href="errors.html">Errors</a></li> <li><a class="nav-events" href="events.html">Events</a></li> <li><a class="nav-fs" href="fs.html">File System</a></li> <li><a class="nav-globals" href="globals.html">Globals</a></li> <li><a class="nav-http" href="http.html">HTTP</a></li> <li><a class="nav-http2" href="http2.html">HTTP/2</a></li> <li><a class="nav-https" href="https.html">HTTPS</a></li> <li><a class="nav-inspector" href="inspector.html">Inspector</a></li> <li><a class="nav-intl" href="intl.html">Internationalization</a></li> <li><a class="nav-modules" href="modules.html">Modules</a></li> <li><a class="nav-net" href="net.html">Net</a></li> <li><a class="nav-os" href="os.html">OS</a></li> <li><a class="nav-path" href="path.html">Path</a></li> <li><a class="nav-perf_hooks" href="perf_hooks.html">Performance Hooks</a></li> <li><a class="nav-process" href="process.html">Process</a></li> <li><a class="nav-punycode" href="punycode.html">Punycode</a></li> <li><a class="nav-querystring" href="querystring.html">Query Strings</a></li> <li><a class="nav-readline" href="readline.html">Readline</a></li> <li><a class="nav-repl" href="repl.html">REPL</a></li> <li><a class="nav-stream" href="stream.html">Stream</a></li> <li><a class="nav-string_decoder" href="string_decoder.html">String Decoder</a></li> <li><a class="nav-timers" href="timers.html">Timers</a></li> <li><a class="nav-tls" href="tls.html">TLS/SSL</a></li> <li><a class="nav-tracing" href="tracing.html">Trace Events</a></li> <li><a class="nav-tty" href="tty.html">TTY</a></li> <li><a class="nav-dgram" href="dgram.html">UDP/Datagram</a></li> <li><a class="nav-url" href="url.html">URL</a></li> <li><a class="nav-util" href="util.html">Utilities</a></li> <li><a class="nav-v8" href="v8.html">V8</a></li> <li><a class="nav-vm" href="vm.html">VM</a></li> <li><a class="nav-worker_threads" href="worker_threads.html">Worker Threads</a></li> <li><a class="nav-zlib" href="zlib.html">Zlib</a></li> </ul> <div class="line"></div> <ul> <li><a class="nav-https-github-com-nodejs-node" href="https://github.com/nodejs/node">GitHub Repo & Issue Tracker</a></li> </ul> </div> <div id="column1" data-id="cli" class="interior"> <header> <h1>Node.js v10.19.0 Documentation</h1> <div id="gtoc"> <ul> <li> <a href="index.html" name="toc">Index</a> </li> <li> <a href="all.html">View on single page</a> </li> <li> <a href="cli.json">View as JSON</a> </li> <li class="version-picker"> <a href="#">View another version <span>▼</span></a> <ol class="version-picker"><li><a href="https://nodejs.org/docs/latest-v12.x/api/cli.html">12.x</a></li> <li><a href="https://nodejs.org/docs/latest-v11.x/api/cli.html">11.x</a></li> <li><a href="https://nodejs.org/docs/latest-v10.x/api/cli.html">10.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v9.x/api/cli.html">9.x</a></li> <li><a href="https://nodejs.org/docs/latest-v8.x/api/cli.html">8.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v7.x/api/cli.html">7.x</a></li> <li><a href="https://nodejs.org/docs/latest-v6.x/api/cli.html">6.x</a></li> <li><a href="https://nodejs.org/docs/latest-v5.x/api/cli.html">5.x</a></li></ol> </li> <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/master/doc/api/cli.md"><span class="github_icon"><svg height="16" width="16" viewBox="0 0 16.1 16.1" fill="currentColor"><path d="M8 0a8 8 0 0 0-2.5 15.6c.4 0 .5-.2.5-.4v-1.5c-2 .4-2.5-.5-2.7-1 0-.1-.5-.9-.8-1-.3-.2-.7-.6 0-.6.6 0 1 .6 1.2.8.7 1.2 1.9 1 2.4.7 0-.5.2-.9.5-1-1.8-.3-3.7-1-3.7-4 0-.9.3-1.6.8-2.2 0-.2-.3-1 .1-2 0 0 .7-.3 2.2.7a7.4 7.4 0 0 1 4 0c1.5-1 2.2-.8 2.2-.8.5 1.1.2 2 .1 2.1.5.6.8 1.3.8 2.2 0 3-1.9 3.7-3.6 4 .3.2.5.7.5 1.4v2.2c0 .2.1.5.5.4A8 8 0 0 0 16 8a8 8 0 0 0-8-8z"/></svg></span>Edit on GitHub</a></li> </ul> </div> <hr> </header> <div id="toc"> <h2>Table of Contents</h2> <ul> <li><a href="#cli_command_line_options">Command Line Options</a><ul> <li><a href="#cli_synopsis">Synopsis</a></li> <li><a href="#cli_options">Options</a><ul> <li><a href="#cli"><code>-</code></a></li> <li><a href="#cli_1"><code>--</code></a></li> <li><a href="#cli_abort_on_uncaught_exception"><code>--abort-on-uncaught-exception</code></a></li> <li><a href="#cli_completion_bash"><code>--completion-bash</code></a></li> <li><a href="#cli_enable_fips"><code>--enable-fips</code></a></li> <li><a href="#cli_experimental_modules"><code>--experimental-modules</code></a></li> <li><a href="#cli_experimental_repl_await"><code>--experimental-repl-await</code></a></li> <li><a href="#cli_experimental_vm_modules"><code>--experimental-vm-modules</code></a></li> <li><a href="#cli_experimental_worker"><code>--experimental-worker</code></a></li> <li><a href="#cli_force_fips"><code>--force-fips</code></a></li> <li><a href="#cli_icu_data_dir_file"><code>--icu-data-dir=file</code></a></li> <li><a href="#cli_inspect_brk_host_port"><code>--inspect-brk[=[host:]port]</code></a></li> <li><a href="#cli_inspect_port_host_port"><code>--inspect-port=[host:]port</code></a></li> <li><a href="#cli_inspect_host_port"><code>--inspect[=[host:]port]</code></a><ul> <li><a href="#cli_warning_binding_inspector_to_a_public_ip_port_combination_is_insecure">Warning: binding inspector to a public IP:port combination is insecure</a></li> </ul> </li> <li><a href="#cli_loader_file"><code>--loader=file</code></a></li> <li><a href="#cli_insecure_http_parser"><code>--insecure-http-parser</code></a></li> <li><a href="#cli_max_http_header_size_size"><code>--max-http-header-size=size</code></a></li> <li><a href="#cli_napi_modules"><code>--napi-modules</code></a></li> <li><a href="#cli_no_deprecation"><code>--no-deprecation</code></a></li> <li><a href="#cli_no_force_async_hooks_checks"><code>--no-force-async-hooks-checks</code></a></li> <li><a href="#cli_no_warnings"><code>--no-warnings</code></a></li> <li><a href="#cli_openssl_config_file"><code>--openssl-config=file</code></a></li> <li><a href="#cli_pending_deprecation"><code>--pending-deprecation</code></a></li> <li><a href="#cli_preserve_symlinks"><code>--preserve-symlinks</code></a></li> <li><a href="#cli_preserve_symlinks_main"><code>--preserve-symlinks-main</code></a></li> <li><a href="#cli_prof"><code>--prof</code></a></li> <li><a href="#cli_prof_process"><code>--prof-process</code></a></li> <li><a href="#cli_redirect_warnings_file"><code>--redirect-warnings=file</code></a></li> <li><a href="#cli_throw_deprecation"><code>--throw-deprecation</code></a></li> <li><a href="#cli_title_title"><code>--title=title</code></a></li> <li><a href="#cli_tls_cipher_list_list"><code>--tls-cipher-list=list</code></a></li> <li><a href="#cli_trace_deprecation"><code>--trace-deprecation</code></a></li> <li><a href="#cli_trace_event_categories"><code>--trace-event-categories</code></a></li> <li><a href="#cli_trace_event_file_pattern"><code>--trace-event-file-pattern</code></a></li> <li><a href="#cli_trace_events_enabled"><code>--trace-events-enabled</code></a></li> <li><a href="#cli_trace_sync_io"><code>--trace-sync-io</code></a></li> <li><a href="#cli_trace_warnings"><code>--trace-warnings</code></a></li> <li><a href="#cli_track_heap_objects"><code>--track-heap-objects</code></a></li> <li><a href="#cli_unhandled_rejections_mode"><code>--unhandled-rejections=mode</code></a></li> <li><a href="#cli_use_bundled_ca_use_openssl_ca"><code>--use-bundled-ca</code>, <code>--use-openssl-ca</code></a></li> <li><a href="#cli_v8_options"><code>--v8-options</code></a></li> <li><a href="#cli_v8_pool_size_num"><code>--v8-pool-size=num</code></a></li> <li><a href="#cli_zero_fill_buffers"><code>--zero-fill-buffers</code></a></li> <li><a href="#cli_c_check"><code>-c</code>, <code>--check</code></a></li> <li><a href="#cli_e_eval_script"><code>-e</code>, <code>--eval "script"</code></a></li> <li><a href="#cli_h_help"><code>-h</code>, <code>--help</code></a></li> <li><a href="#cli_i_interactive"><code>-i</code>, <code>--interactive</code></a></li> <li><a href="#cli_p_print_script"><code>-p</code>, <code>--print "script"</code></a></li> <li><a href="#cli_r_require_module"><code>-r</code>, <code>--require module</code></a></li> <li><a href="#cli_v_version"><code>-v</code>, <code>--version</code></a></li> </ul> </li> <li><a href="#cli_environment_variables">Environment Variables</a><ul> <li><a href="#cli_node_debug_module"><code>NODE_DEBUG=module[,…]</code></a></li> <li><a href="#cli_node_debug_native_module"><code>NODE_DEBUG_NATIVE=module[,…]</code></a></li> <li><a href="#cli_node_disable_colors_1"><code>NODE_DISABLE_COLORS=1</code></a></li> <li><a href="#cli_node_extra_ca_certs_file"><code>NODE_EXTRA_CA_CERTS=file</code></a></li> <li><a href="#cli_node_icu_data_file"><code>NODE_ICU_DATA=file</code></a></li> <li><a href="#cli_node_no_warnings_1"><code>NODE_NO_WARNINGS=1</code></a></li> <li><a href="#cli_node_options_options"><code>NODE_OPTIONS=options...</code></a></li> <li><a href="#cli_node_path_path"><code>NODE_PATH=path[:…]</code></a></li> <li><a href="#cli_node_pending_deprecation_1"><code>NODE_PENDING_DEPRECATION=1</code></a></li> <li><a href="#cli_node_preserve_symlinks_1"><code>NODE_PRESERVE_SYMLINKS=1</code></a></li> <li><a href="#cli_node_redirect_warnings_file"><code>NODE_REDIRECT_WARNINGS=file</code></a></li> <li><a href="#cli_node_repl_history_file"><code>NODE_REPL_HISTORY=file</code></a></li> <li><a href="#cli_node_tls_reject_unauthorized_value"><code>NODE_TLS_REJECT_UNAUTHORIZED=value</code></a></li> <li><a href="#cli_node_v8_coverage_dir"><code>NODE_V8_COVERAGE=dir</code></a></li> <li><a href="#cli_openssl_conf_file"><code>OPENSSL_CONF=file</code></a></li> <li><a href="#cli_ssl_cert_dir_dir"><code>SSL_CERT_DIR=dir</code></a></li> <li><a href="#cli_ssl_cert_file_file"><code>SSL_CERT_FILE=file</code></a></li> <li><a href="#cli_uv_threadpool_size_size"><code>UV_THREADPOOL_SIZE=size</code></a></li> </ul> </li> </ul> </li> </ul> </div> <div id="apicontent"> <h1>Command Line Options<span><a class="mark" href="#cli_command_line_options" id="cli_command_line_options">#</a></span></h1> <!--introduced_in=v5.9.1--> <!--type=misc--> <p>Node.js comes with a variety of CLI options. These options expose built-in debugging, multiple ways to execute scripts, and other helpful runtime options.</p> <p>To view this documentation as a manual page in a terminal, run <code>man node</code>.</p> <h2>Synopsis<span><a class="mark" href="#cli_synopsis" id="cli_synopsis">#</a></span></h2> <p><code>node [options] [V8 options] [script.js | -e "script" | -] [--] [arguments]</code></p> <p><code>node inspect [script.js | -e "script" | <host>:<port>] …</code></p> <p><code>node --v8-options</code></p> <p>Execute without arguments to start the <a href="repl.html">REPL</a>.</p> <p><em>For more info about <code>node inspect</code>, please see the <a href="debugger.html">debugger</a> documentation.</em></p> <h2>Options<span><a class="mark" href="#cli_options" id="cli_options">#</a></span></h2> <div class="api_metadata"> <details class="changelog"><summary>History</summary> <table> <tr><th>Version</th><th>Changes</th></tr> <tr><td>v10.12.0</td> <td><p>Underscores instead of dashes are now allowed for Node.js options as well, in addition to V8 options.</p> </td></tr> </table> </details> </div><p>All options, including V8 options, allow words to be separated by both dashes (<code>-</code>) or underscores (<code>_</code>).</p> <p>For example, <code>--pending-deprecation</code> is equivalent to <code>--pending_deprecation</code>.</p> <h3><code>-</code><span><a class="mark" href="#cli" id="cli">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div><p>Alias for stdin, analogous to the use of - in other command line utilities, meaning that the script will be read from stdin, and the rest of the options are passed to that script.</p> <h3><code>--</code><span><a class="mark" href="#cli_1" id="cli_1">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.11.0</span> </div><p>Indicate the end of node options. Pass the rest of the arguments to the script. If no script filename or eval/print script is supplied prior to this, then the next argument will be used as a script filename.</p> <h3><code>--abort-on-uncaught-exception</code><span><a class="mark" href="#cli_abort_on_uncaught_exception" id="cli_abort_on_uncaught_exception">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.10</span> </div><p>Aborting instead of exiting causes a core file to be generated for post-mortem analysis using a debugger (such as <code>lldb</code>, <code>gdb</code>, and <code>mdb</code>).</p> <p>If this flag is passed, the behavior can still be set to not abort through <a href="process.html#process_process_setuncaughtexceptioncapturecallback_fn"><code>process.setUncaughtExceptionCaptureCallback()</code></a> (and through usage of the <code>domain</code> module that uses it).</p> <h3><code>--completion-bash</code><span><a class="mark" href="#cli_completion_bash" id="cli_completion_bash">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.12.0</span> </div><p>Print source-able bash completion script for Node.js.</p> <pre><code class="language-console">$ node --completion-bash > node_bash_completion $ source node_bash_completion</code></pre> <h3><code>--enable-fips</code><span><a class="mark" href="#cli_enable_fips" id="cli_enable_fips">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.0.0</span> </div><p>Enable FIPS-compliant crypto at startup. (Requires Node.js to be built with <code>./configure --openssl-fips</code>.)</p> <h3><code>--experimental-modules</code><span><a class="mark" href="#cli_experimental_modules" id="cli_experimental_modules">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.5.0</span> </div><p>Enable experimental ES module support and caching modules.</p> <h3><code>--experimental-repl-await</code><span><a class="mark" href="#cli_experimental_repl_await" id="cli_experimental_repl_await">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.0.0</span> </div><p>Enable experimental top-level <code>await</code> keyword support in REPL.</p> <h3><code>--experimental-vm-modules</code><span><a class="mark" href="#cli_experimental_vm_modules" id="cli_experimental_vm_modules">#</a></span></h3> <div class="api_metadata"> <span>Added in: v9.6.0</span> </div><p>Enable experimental ES Module support in the <code>vm</code> module.</p> <h3><code>--experimental-worker</code><span><a class="mark" href="#cli_experimental_worker" id="cli_experimental_worker">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.5.0</span> </div><p>Enable experimental worker threads using the <code>worker_threads</code> module.</p> <h3><code>--force-fips</code><span><a class="mark" href="#cli_force_fips" id="cli_force_fips">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.0.0</span> </div><p>Force FIPS-compliant crypto on startup. (Cannot be disabled from script code.) (Same requirements as <code>--enable-fips</code>.)</p> <h3><code>--icu-data-dir=file</code><span><a class="mark" href="#cli_icu_data_dir_file" id="cli_icu_data_dir_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.11.15</span> </div><p>Specify ICU data load path. (Overrides <code>NODE_ICU_DATA</code>.)</p> <h3><code>--inspect-brk[=[host:]port]</code><span><a class="mark" href="#cli_inspect_brk_host_port" id="cli_inspect_brk_host_port">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.6.0</span> </div><p>Activate inspector on <code>host:port</code> and break at start of user script. Default <code>host:port</code> is <code>127.0.0.1:9229</code>.</p> <h3><code>--inspect-port=[host:]port</code><span><a class="mark" href="#cli_inspect_port_host_port" id="cli_inspect_port_host_port">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.6.0</span> </div><p>Set the <code>host:port</code> to be used when the inspector is activated. Useful when activating the inspector by sending the <code>SIGUSR1</code> signal.</p> <p>Default host is <code>127.0.0.1</code>.</p> <p>See the <a href="#inspector_security">security warning</a> below regarding the <code>host</code> parameter usage.</p> <h3><code>--inspect[=[host:]port]</code><span><a class="mark" href="#cli_inspect_host_port" id="cli_inspect_host_port">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.3.0</span> </div><p>Activate inspector on <code>host:port</code>. Default is <code>127.0.0.1:9229</code>.</p> <p>V8 inspector integration allows tools such as Chrome DevTools and IDEs to debug and profile Node.js instances. The tools attach to Node.js instances via a tcp port and communicate using the <a href="https://chromedevtools.github.io/devtools-protocol/">Chrome DevTools Protocol</a>.</p> <p><a id="inspector_security"></a></p> <h4>Warning: binding inspector to a public IP:port combination is insecure<span><a class="mark" href="#cli_warning_binding_inspector_to_a_public_ip_port_combination_is_insecure" id="cli_warning_binding_inspector_to_a_public_ip_port_combination_is_insecure">#</a></span></h4> <p>Binding the inspector to a public IP (including <code>0.0.0.0</code>) with an open port is insecure, as it allows external hosts to connect to the inspector and perform a <a href="https://www.owasp.org/index.php/Code_Injection">remote code execution</a> attack.</p> <p>If you specify a host, make sure that at least one of the following is true: either the host is not public, or the port is properly firewalled to disallow unwanted connections.</p> <p><strong>More specifically, <code>--inspect=0.0.0.0</code> is insecure if the port (<code>9229</code> by default) is not firewall-protected.</strong></p> <p>See the <a href="https://nodejs.org/en/docs/guides/debugging-getting-started/#security-implications">debugging security implications</a> section for more information.</p> <h3><code>--loader=file</code><span><a class="mark" href="#cli_loader_file" id="cli_loader_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v9.0.0</span> </div><p>Specify the <code>file</code> of the custom <a href="esm.html#esm_loader_hooks">experimental ECMAScript Module</a> loader.</p> <h3><code>--insecure-http-parser</code><span><a class="mark" href="#cli_insecure_http_parser" id="cli_insecure_http_parser">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.19.0</span> </div><p>Use an insecure HTTP parser that accepts invalid HTTP headers. This may allow interoperability with non-conformant HTTP implementations. It may also allow request smuggling and other HTTP attacks that rely on invalid headers being accepted. Avoid using this option.</p> <h3><code>--max-http-header-size=size</code><span><a class="mark" href="#cli_max_http_header_size_size" id="cli_max_http_header_size_size">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.15.0</span> </div><p>Specify the maximum size, in bytes, of HTTP headers. Defaults to 8KB.</p> <h3><code>--napi-modules</code><span><a class="mark" href="#cli_napi_modules" id="cli_napi_modules">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.10.0</span> </div><p>This option is a no-op. It is kept for compatibility.</p> <h3><code>--no-deprecation</code><span><a class="mark" href="#cli_no_deprecation" id="cli_no_deprecation">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.8.0</span> </div><p>Silence deprecation warnings.</p> <h3><code>--no-force-async-hooks-checks</code><span><a class="mark" href="#cli_no_force_async_hooks_checks" id="cli_no_force_async_hooks_checks">#</a></span></h3> <div class="api_metadata"> <span>Added in: v9.0.0</span> </div><p>Disables runtime checks for <code>async_hooks</code>. These will still be enabled dynamically when <code>async_hooks</code> is enabled.</p> <h3><code>--no-warnings</code><span><a class="mark" href="#cli_no_warnings" id="cli_no_warnings">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.0.0</span> </div><p>Silence all process warnings (including deprecations).</p> <h3><code>--openssl-config=file</code><span><a class="mark" href="#cli_openssl_config_file" id="cli_openssl_config_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.9.0</span> </div><p>Load an OpenSSL configuration file on startup. Among other uses, this can be used to enable FIPS-compliant crypto if Node.js is built with <code>./configure --openssl-fips</code>.</p> <h3><code>--pending-deprecation</code><span><a class="mark" href="#cli_pending_deprecation" id="cli_pending_deprecation">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div><p>Emit pending deprecation warnings.</p> <p>Pending deprecations are generally identical to a runtime deprecation with the notable exception that they are turned <em>off</em> by default and will not be emitted unless either the <code>--pending-deprecation</code> command line flag, or the <code>NODE_PENDING_DEPRECATION=1</code> environment variable, is set. Pending deprecations are used to provide a kind of selective "early warning" mechanism that developers may leverage to detect deprecated API usage.</p> <h3><code>--preserve-symlinks</code><span><a class="mark" href="#cli_preserve_symlinks" id="cli_preserve_symlinks">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.3.0</span> </div><p>Instructs the module loader to preserve symbolic links when resolving and caching modules.</p> <p>By default, when Node.js loads a module from a path that is symbolically linked to a different on-disk location, Node.js will dereference the link and use the actual on-disk "real path" of the module as both an identifier and as a root path to locate other dependency modules. In most cases, this default behavior is acceptable. However, when using symbolically linked peer dependencies, as illustrated in the example below, the default behavior causes an exception to be thrown if <code>moduleA</code> attempts to require <code>moduleB</code> as a peer dependency:</p> <pre><code class="language-text">{appDir} ├── app │ ├── index.js │ └── node_modules │ ├── moduleA -> {appDir}/moduleA │ └── moduleB │ ├── index.js │ └── package.json └── moduleA ├── index.js └── package.json</code></pre> <p>The <code>--preserve-symlinks</code> command line flag instructs Node.js to use the symlink path for modules as opposed to the real path, allowing symbolically linked peer dependencies to be found.</p> <p>Note, however, that using <code>--preserve-symlinks</code> can have other side effects. Specifically, symbolically linked <em>native</em> modules can fail to load if those are linked from more than one location in the dependency tree (Node.js would see those as two separate modules and would attempt to load the module multiple times, causing an exception to be thrown).</p> <p>The <code>--preserve-symlinks</code> flag does not apply to the main module, which allows <code>node --preserve-symlinks node_module/.bin/<foo></code> to work. To apply the same behavior for the main module, also use <code>--preserve-symlinks-main</code>.</p> <h3><code>--preserve-symlinks-main</code><span><a class="mark" href="#cli_preserve_symlinks_main" id="cli_preserve_symlinks_main">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.2.0</span> </div><p>Instructs the module loader to preserve symbolic links when resolving and caching the main module (<code>require.main</code>).</p> <p>This flag exists so that the main module can be opted-in to the same behavior that <code>--preserve-symlinks</code> gives to all other imports; they are separate flags, however, for backward compatibility with older Node.js versions.</p> <p>Note that <code>--preserve-symlinks-main</code> does not imply <code>--preserve-symlinks</code>; it is expected that <code>--preserve-symlinks-main</code> will be used in addition to <code>--preserve-symlinks</code> when it is not desirable to follow symlinks before resolving relative paths.</p> <p>See <code>--preserve-symlinks</code> for more information.</p> <h3><code>--prof</code><span><a class="mark" href="#cli_prof" id="cli_prof">#</a></span></h3> <div class="api_metadata"> <span>Added in: v2.0.0</span> </div><p>Generate V8 profiler output.</p> <h3><code>--prof-process</code><span><a class="mark" href="#cli_prof_process" id="cli_prof_process">#</a></span></h3> <div class="api_metadata"> <span>Added in: v5.2.0</span> </div><p>Process V8 profiler output generated using the V8 option <code>--prof</code>.</p> <h3><code>--redirect-warnings=file</code><span><a class="mark" href="#cli_redirect_warnings_file" id="cli_redirect_warnings_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div><p>Write process warnings to the given file instead of printing to stderr. The file will be created if it does not exist, and will be appended to if it does. If an error occurs while attempting to write the warning to the file, the warning will be written to stderr instead.</p> <h3><code>--throw-deprecation</code><span><a class="mark" href="#cli_throw_deprecation" id="cli_throw_deprecation">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.11.14</span> </div><p>Throw errors for deprecations.</p> <h3><code>--title=title</code><span><a class="mark" href="#cli_title_title" id="cli_title_title">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.7.0</span> </div><p>Set <code>process.title</code> on startup.</p> <h3><code>--tls-cipher-list=list</code><span><a class="mark" href="#cli_tls_cipher_list_list" id="cli_tls_cipher_list_list">#</a></span></h3> <div class="api_metadata"> <span>Added in: v4.0.0</span> </div><p>Specify an alternative default TLS cipher list. Requires Node.js to be built with crypto support (default).</p> <h3><code>--trace-deprecation</code><span><a class="mark" href="#cli_trace_deprecation" id="cli_trace_deprecation">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.8.0</span> </div><p>Print stack traces for deprecations.</p> <h3><code>--trace-event-categories</code><span><a class="mark" href="#cli_trace_event_categories" id="cli_trace_event_categories">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.7.0</span> </div><p>A comma separated list of categories that should be traced when trace event tracing is enabled using <code>--trace-events-enabled</code>.</p> <h3><code>--trace-event-file-pattern</code><span><a class="mark" href="#cli_trace_event_file_pattern" id="cli_trace_event_file_pattern">#</a></span></h3> <div class="api_metadata"> <span>Added in: v9.8.0</span> </div><p>Template string specifying the filepath for the trace event data, it supports <code>${rotation}</code> and <code>${pid}</code>.</p> <h3><code>--trace-events-enabled</code><span><a class="mark" href="#cli_trace_events_enabled" id="cli_trace_events_enabled">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.7.0</span> </div><p>Enables the collection of trace event tracing information.</p> <h3><code>--trace-sync-io</code><span><a class="mark" href="#cli_trace_sync_io" id="cli_trace_sync_io">#</a></span></h3> <div class="api_metadata"> <span>Added in: v2.1.0</span> </div><p>Prints a stack trace whenever synchronous I/O is detected after the first turn of the event loop.</p> <h3><code>--trace-warnings</code><span><a class="mark" href="#cli_trace_warnings" id="cli_trace_warnings">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.0.0</span> </div><p>Print stack traces for process warnings (including deprecations).</p> <h3><code>--track-heap-objects</code><span><a class="mark" href="#cli_track_heap_objects" id="cli_track_heap_objects">#</a></span></h3> <div class="api_metadata"> <span>Added in: v2.4.0</span> </div><p>Track heap object allocations for heap snapshots.</p> <h3><code>--unhandled-rejections=mode</code><span><a class="mark" href="#cli_unhandled_rejections_mode" id="cli_unhandled_rejections_mode">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.17.0</span> </div><p>By default all unhandled rejections trigger a warning plus a deprecation warning for the very first unhandled rejection in case no <a href="process.html#process_event_unhandledrejection"><code>unhandledRejection</code></a> hook is used.</p> <p>Using this flag allows to change what should happen when an unhandled rejection occurs. One of three modes can be chosen:</p> <ul> <li><code>strict</code>: Raise the unhandled rejection as an uncaught exception.</li> <li><code>warn</code>: Always trigger a warning, no matter if the <a href="process.html#process_event_unhandledrejection"><code>unhandledRejection</code></a> hook is set or not but do not print the deprecation warning.</li> <li><code>none</code>: Silence all warnings.</li> </ul> <h3><code>--use-bundled-ca</code>, <code>--use-openssl-ca</code><span><a class="mark" href="#cli_use_bundled_ca_use_openssl_ca" id="cli_use_bundled_ca_use_openssl_ca">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.11.0</span> </div><p>Use bundled Mozilla CA store as supplied by current Node.js version or use OpenSSL's default CA store. The default store is selectable at build-time.</p> <p>The bundled CA store, as supplied by Node.js, is a snapshot of Mozilla CA store that is fixed at release time. It is identical on all supported platforms.</p> <p>Using OpenSSL store allows for external modifications of the store. For most Linux and BSD distributions, this store is maintained by the distribution maintainers and system administrators. OpenSSL CA store location is dependent on configuration of the OpenSSL library but this can be altered at runtime using environment variables.</p> <p>See <code>SSL_CERT_DIR</code> and <code>SSL_CERT_FILE</code>.</p> <h3><code>--v8-options</code><span><a class="mark" href="#cli_v8_options" id="cli_v8_options">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.1.3</span> </div><p>Print V8 command line options.</p> <h3><code>--v8-pool-size=num</code><span><a class="mark" href="#cli_v8_pool_size_num" id="cli_v8_pool_size_num">#</a></span></h3> <div class="api_metadata"> <span>Added in: v5.10.0</span> </div><p>Set V8's thread pool size which will be used to allocate background jobs.</p> <p>If set to <code>0</code> then V8 will choose an appropriate size of the thread pool based on the number of online processors.</p> <p>If the value provided is larger than V8's maximum, then the largest value will be chosen.</p> <h3><code>--zero-fill-buffers</code><span><a class="mark" href="#cli_zero_fill_buffers" id="cli_zero_fill_buffers">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.0.0</span> </div><p>Automatically zero-fills all newly allocated <a href="buffer.html#buffer_class_buffer"><code>Buffer</code></a> and <a href="buffer.html#buffer_class_slowbuffer"><code>SlowBuffer</code></a> instances.</p> <h3><code>-c</code>, <code>--check</code><span><a class="mark" href="#cli_c_check" id="cli_c_check">#</a></span></h3> <div class="api_metadata"> <details class="changelog"><summary>History</summary> <table> <tr><th>Version</th><th>Changes</th></tr> <tr><td>v10.0.0</td> <td><p>The <code>--require</code> option is now supported when checking a file.</p> </td></tr> <tr><td>v5.0.0, v4.2.0</td> <td><p><span>Added in: v5.0.0, v4.2.0</span></p> </td></tr> </table> </details> </div><p>Syntax check the script without executing.</p> <h3><code>-e</code>, <code>--eval "script"</code><span><a class="mark" href="#cli_e_eval_script" id="cli_e_eval_script">#</a></span></h3> <div class="api_metadata"> <details class="changelog"><summary>History</summary> <table> <tr><th>Version</th><th>Changes</th></tr> <tr><td>v5.11.0</td> <td><p>Built-in libraries are now available as predefined variables.</p> </td></tr> <tr><td>v0.5.2</td> <td><p><span>Added in: v0.5.2</span></p> </td></tr> </table> </details> </div><p>Evaluate the following argument as JavaScript. The modules which are predefined in the REPL can also be used in <code>script</code>.</p> <p>On Windows, using <code>cmd.exe</code> a single quote will not work correctly because it only recognizes double <code>"</code> for quoting. In Powershell or Git bash, both <code>'</code> and <code>"</code> are usable.</p> <h3><code>-h</code>, <code>--help</code><span><a class="mark" href="#cli_h_help" id="cli_h_help">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.1.3</span> </div><p>Print node command line options. The output of this option is less detailed than this document.</p> <h3><code>-i</code>, <code>--interactive</code><span><a class="mark" href="#cli_i_interactive" id="cli_i_interactive">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.7.7</span> </div><p>Opens the REPL even if stdin does not appear to be a terminal.</p> <h3><code>-p</code>, <code>--print "script"</code><span><a class="mark" href="#cli_p_print_script" id="cli_p_print_script">#</a></span></h3> <div class="api_metadata"> <details class="changelog"><summary>History</summary> <table> <tr><th>Version</th><th>Changes</th></tr> <tr><td>v5.11.0</td> <td><p>Built-in libraries are now available as predefined variables.</p> </td></tr> <tr><td>v0.6.4</td> <td><p><span>Added in: v0.6.4</span></p> </td></tr> </table> </details> </div><p>Identical to <code>-e</code> but prints the result.</p> <h3><code>-r</code>, <code>--require module</code><span><a class="mark" href="#cli_r_require_module" id="cli_r_require_module">#</a></span></h3> <div class="api_metadata"> <span>Added in: v1.6.0</span> </div><p>Preload the specified module at startup.</p> <p>Follows <code>require()</code>'s module resolution rules. <code>module</code> may be either a path to a file, or a node module name.</p> <h3><code>-v</code>, <code>--version</code><span><a class="mark" href="#cli_v_version" id="cli_v_version">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.1.3</span> </div><p>Print node's version.</p> <h2>Environment Variables<span><a class="mark" href="#cli_environment_variables" id="cli_environment_variables">#</a></span></h2> <h3><code>NODE_DEBUG=module[,…]</code><span><a class="mark" href="#cli_node_debug_module" id="cli_node_debug_module">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.1.32</span> </div><p><code>','</code>-separated list of core modules that should print debug information.</p> <h3><code>NODE_DEBUG_NATIVE=module[,…]</code><span><a class="mark" href="#cli_node_debug_native_module" id="cli_node_debug_native_module">#</a></span></h3> <p><code>','</code>-separated list of core C++ modules that should print debug information.</p> <h3><code>NODE_DISABLE_COLORS=1</code><span><a class="mark" href="#cli_node_disable_colors_1" id="cli_node_disable_colors_1">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.3.0</span> </div><p>When set to <code>1</code> colors will not be used in the REPL.</p> <h3><code>NODE_EXTRA_CA_CERTS=file</code><span><a class="mark" href="#cli_node_extra_ca_certs_file" id="cli_node_extra_ca_certs_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.3.0</span> </div><p>When set, the well known "root" CAs (like VeriSign) will be extended with the extra certificates in <code>file</code>. The file should consist of one or more trusted certificates in PEM format. A message will be emitted (once) with <a href="process.html#process_process_emitwarning_warning_type_code_ctor"><code>process.emitWarning()</code></a> if the file is missing or malformed, but any errors are otherwise ignored.</p> <p>Note that neither the well known nor extra certificates are used when the <code>ca</code> options property is explicitly specified for a TLS or HTTPS client or server.</p> <p>This environment variable is ignored when <code>node</code> runs as setuid root or has Linux file capabilities set.</p> <h3><code>NODE_ICU_DATA=file</code><span><a class="mark" href="#cli_node_icu_data_file" id="cli_node_icu_data_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.11.15</span> </div><p>Data path for ICU (<code>Intl</code> object) data. Will extend linked-in data when compiled with small-icu support.</p> <h3><code>NODE_NO_WARNINGS=1</code><span><a class="mark" href="#cli_node_no_warnings_1" id="cli_node_no_warnings_1">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.11.0</span> </div><p>When set to <code>1</code>, process warnings are silenced.</p> <h3><code>NODE_OPTIONS=options...</code><span><a class="mark" href="#cli_node_options_options" id="cli_node_options_options">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div><p>A space-separated list of command line options. <code>options...</code> are interpreted as if they had been specified on the command line before the actual command line (so they can be overridden). Node.js will exit with an error if an option that is not allowed in the environment is used, such as <code>-p</code> or a script file.</p> <p>Node.js options that are allowed are:</p> <ul> <li><code>--enable-fips</code></li> <li><code>--experimental-modules</code></li> <li><code>--experimental-repl-await</code></li> <li><code>--experimental-vm-modules</code></li> <li><code>--experimental-worker</code></li> <li><code>--force-fips</code></li> <li><code>--icu-data-dir</code></li> <li><code>--insecure-http-parser</code></li> <li><code>--inspect</code></li> <li><code>--inspect-brk</code></li> <li><code>--inspect-port</code></li> <li><code>--loader</code></li> <li><code>--max-http-header-size</code></li> <li><code>--napi-modules</code></li> <li><code>--no-deprecation</code></li> <li><code>--no-force-async-hooks-checks</code></li> <li><code>--no-warnings</code></li> <li><code>--openssl-config</code></li> <li><code>--pending-deprecation</code></li> <li><code>--redirect-warnings</code></li> <li><code>--require</code>, <code>-r</code></li> <li><code>--throw-deprecation</code></li> <li><code>--title</code></li> <li><code>--tls-cipher-list</code></li> <li><code>--trace-deprecation</code></li> <li><code>--trace-event-categories</code></li> <li><code>--trace-event-file-pattern</code></li> <li><code>--trace-events-enabled</code></li> <li><code>--trace-sync-io</code></li> <li><code>--trace-warnings</code></li> <li><code>--track-heap-objects</code></li> <li><code>--unhandled-rejections</code></li> <li><code>--use-bundled-ca</code></li> <li><code>--use-openssl-ca</code></li> <li><code>--v8-pool-size</code></li> <li><code>--zero-fill-buffers</code></li> </ul> <p>V8 options that are allowed are:</p> <ul> <li><code>--abort-on-uncaught-exception</code></li> <li><code>--max-old-space-size</code></li> <li><code>--perf-basic-prof</code></li> <li><code>--perf-prof</code></li> <li><code>--stack-trace-limit</code></li> </ul> <h3><code>NODE_PATH=path[:…]</code><span><a class="mark" href="#cli_node_path_path" id="cli_node_path_path">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.1.32</span> </div><p><code>':'</code>-separated list of directories prefixed to the module search path.</p> <p>On Windows, this is a <code>';'</code>-separated list instead.</p> <h3><code>NODE_PENDING_DEPRECATION=1</code><span><a class="mark" href="#cli_node_pending_deprecation_1" id="cli_node_pending_deprecation_1">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div><p>When set to <code>1</code>, emit pending deprecation warnings.</p> <p>Pending deprecations are generally identical to a runtime deprecation with the notable exception that they are turned <em>off</em> by default and will not be emitted unless either the <code>--pending-deprecation</code> command line flag, or the <code>NODE_PENDING_DEPRECATION=1</code> environment variable, is set. Pending deprecations are used to provide a kind of selective "early warning" mechanism that developers may leverage to detect deprecated API usage.</p> <h3><code>NODE_PRESERVE_SYMLINKS=1</code><span><a class="mark" href="#cli_node_preserve_symlinks_1" id="cli_node_preserve_symlinks_1">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.1.0</span> </div><p>When set to <code>1</code>, instructs the module loader to preserve symbolic links when resolving and caching modules.</p> <h3><code>NODE_REDIRECT_WARNINGS=file</code><span><a class="mark" href="#cli_node_redirect_warnings_file" id="cli_node_redirect_warnings_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div><p>When set, process warnings will be emitted to the given file instead of printing to stderr. The file will be created if it does not exist, and will be appended to if it does. If an error occurs while attempting to write the warning to the file, the warning will be written to stderr instead. This is equivalent to using the <code>--redirect-warnings=file</code> command-line flag.</p> <h3><code>NODE_REPL_HISTORY=file</code><span><a class="mark" href="#cli_node_repl_history_file" id="cli_node_repl_history_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v3.0.0</span> </div><p>Path to the file used to store the persistent REPL history. The default path is <code>~/.node_repl_history</code>, which is overridden by this variable. Setting the value to an empty string (<code>''</code> or <code>' '</code>) disables persistent REPL history.</p> <h3><code>NODE_TLS_REJECT_UNAUTHORIZED=value</code><span><a class="mark" href="#cli_node_tls_reject_unauthorized_value" id="cli_node_tls_reject_unauthorized_value">#</a></span></h3> <p>If <code>value</code> equals <code>'0'</code>, certificate validation is disabled for TLS connections. This makes TLS, and HTTPS by extension, insecure. The use of this environment variable is strongly discouraged.</p> <h3><code>NODE_V8_COVERAGE=dir</code><span><a class="mark" href="#cli_node_v8_coverage_dir" id="cli_node_v8_coverage_dir">#</a></span></h3> <p>When set, Node.js will begin outputting <a href="https://v8project.blogspot.com/2017/12/javascript-code-coverage.html">V8 JavaScript code coverage</a> to the directory provided as an argument. Coverage is output as an array of <a href="https://chromedevtools.github.io/devtools-protocol/tot/Profiler#type-ScriptCoverage">ScriptCoverage</a> objects:</p> <pre><code class="language-json">{ "result": [ { "scriptId": "67", "url": "internal/tty.js", "functions": [] } ] }</code></pre> <p><code>NODE_V8_COVERAGE</code> will automatically propagate to subprocesses, making it easier to instrument applications that call the <code>child_process.spawn()</code> family of functions. <code>NODE_V8_COVERAGE</code> can be set to an empty string, to prevent propagation.</p> <p>At this time coverage is only collected in the main thread and will not be output for code executed by worker threads.</p> <h3><code>OPENSSL_CONF=file</code><span><a class="mark" href="#cli_openssl_conf_file" id="cli_openssl_conf_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.11.0</span> </div><p>Load an OpenSSL configuration file on startup. Among other uses, this can be used to enable FIPS-compliant crypto if Node.js is built with <code>./configure --openssl-fips</code>.</p> <p>If the <a href="#cli_openssl_config_file"><code>--openssl-config</code></a> command line option is used, the environment variable is ignored.</p> <h3><code>SSL_CERT_DIR=dir</code><span><a class="mark" href="#cli_ssl_cert_dir_dir" id="cli_ssl_cert_dir_dir">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.7.0</span> </div><p>If <code>--use-openssl-ca</code> is enabled, this overrides and sets OpenSSL's directory containing trusted certificates.</p> <p>Be aware that unless the child environment is explicitly set, this environment variable will be inherited by any child processes, and if they use OpenSSL, it may cause them to trust the same CAs as node.</p> <h3><code>SSL_CERT_FILE=file</code><span><a class="mark" href="#cli_ssl_cert_file_file" id="cli_ssl_cert_file_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.7.0</span> </div><p>If <code>--use-openssl-ca</code> is enabled, this overrides and sets OpenSSL's file containing trusted certificates.</p> <p>Be aware that unless the child environment is explicitly set, this environment variable will be inherited by any child processes, and if they use OpenSSL, it may cause them to trust the same CAs as node.</p> <h3><code>UV_THREADPOOL_SIZE=size</code><span><a class="mark" href="#cli_uv_threadpool_size_size" id="cli_uv_threadpool_size_size">#</a></span></h3> <p>Set the number of threads used in libuv's threadpool to <code>size</code> threads.</p> <p>Asynchronous system APIs are used by Node.js whenever possible, but where they do not exist, libuv's threadpool is used to create asynchronous node APIs based on synchronous system APIs. Node.js APIs that use the threadpool are:</p> <ul> <li>all <code>fs</code> APIs, other than the file watcher APIs and those that are explicitly synchronous</li> <li><code>crypto.pbkdf2()</code></li> <li><code>crypto.randomBytes()</code>, unless it is used without a callback</li> <li><code>crypto.randomFill()</code></li> <li><code>dns.lookup()</code></li> <li>all <code>zlib</code> APIs, other than those that are explicitly synchronous</li> </ul> <p>Because libuv's threadpool has a fixed size, it means that if for whatever reason any of these APIs takes a long time, other (seemingly unrelated) APIs that run in libuv's threadpool will experience degraded performance. In order to mitigate this issue, one potential solution is to increase the size of libuv's threadpool by setting the <code>'UV_THREADPOOL_SIZE'</code> environment variable to a value greater than <code>4</code> (its current default value). For more information, see the <a href="http://docs.libuv.org/en/latest/threadpool.html">libuv threadpool documentation</a>.</p> </div> </div> </div> <script src="assets/sh_main.js"></script> <script src="assets/sh_javascript.min.js"></script> <script>highlight(undefined, undefined, 'pre');</script> </body> </html>
Close
