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 | : 18.222.161.57
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7.4.3-4ubuntu2.28
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[ HOME SHELL ]
Name
Size
Permission
Action
[
58.34
KB
-rwxr-xr-x
aa-enabled
30.52
KB
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aa-exec
34.52
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30.23
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38.37
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awk
158.74
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58.37
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42.34
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42.34
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38.34
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bash
1.13
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6.63
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bootctl
62.34
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bunzip2
38.23
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86.34
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38.23
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2.17
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2.17
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3.69
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4.76
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3.69
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3.69
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38.23
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18.15
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1.27
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1.27
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6.65
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90.41
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42.4
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3.25
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853
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82.53
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389
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389
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14.31
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70.34
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83.07
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70.34
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62.37
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50.23
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70.34
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38.23
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51.8
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38.34
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14.31
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14.23
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396
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400
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2.06
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50.09
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42.37
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18.05
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406
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1.49
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150.37
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54.37
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30.51
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46.37
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266.7
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126.77
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106.37
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14.14
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243.2
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30.14
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14.14
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30.14
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14.14
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14.14
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78.38
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20.83
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4.33
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30.23
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90.95
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2.39
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214.34
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66.21
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138.81
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46.34
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38.34
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82.46
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26.23
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26.23
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174.54
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106.37
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7.12
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38.34
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18.05
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1.29
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28
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42.34
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1.29
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42.37
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30.58
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54.34
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78.37
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22.59
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34.23
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38.34
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28
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26.47
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2.1
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34.27
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312.66
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71.41
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34.3
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46.34
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42.34
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26.23
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509.55
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34.29
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38.65
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22.23
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gpasswd
86.39
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gpgv
447.15
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grep
194.47
KB
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38.34
KB
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23.95
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gunzip
2.29
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gzexe
6.3
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95.21
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46.37
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2.46
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38.34
KB
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26.23
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26.22
KB
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i386
26.5
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66.41
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46.37
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62.38
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90.41
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154.41
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30.23
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597.62
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ipcmk
34.3
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34.23
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66.23
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96.97
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14.2
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54.37
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78.24
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jsondiff
1004
B
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3.58
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1004
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1.79
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397
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5.07
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30.23
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kmod
170.34
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22.29
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50.23
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50.23
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31.66
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lcf
7.6
KB
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ldd
5.3
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175.84
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14.31
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8.36
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23.72
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8.36
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38.34
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26.5
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26.5
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74.38
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30.51
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57.56
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14.16
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26.22
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326.96
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50.82
KB
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55.77
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58.34
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38.34
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138.81
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14.31
KB
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130.23
KB
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lscpu
98.23
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lsipc
94.23
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38.55
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66.23
KB
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lsmem
66.23
KB
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lsmod
170.34
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lsns
50.23
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128
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mawk
158.74
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mcookie
34.3
KB
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46.37
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46.37
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14.23
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34.28
KB
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86.34
KB
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66.34
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70.34
KB
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205.96
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mkswapfile
865
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mktemp
46.34
KB
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42.15
KB
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54.23
KB
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14.23
KB
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mv
146.38
KB
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namei
34.23
KB
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nawk
158.74
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nc
42.64
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42.64
KB
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42.64
KB
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networkctl
74.23
KB
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43.73
KB
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42.34
KB
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26.23
KB
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nl
42.43
KB
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nohup
42.34
KB
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nproc
42.34
KB
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nsenter
34.43
KB
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nstat
78.23
KB
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66.4
KB
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od
70.37
KB
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openssl
735.68
KB
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p11-kit
34.39
KB
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p11tool
355.38
KB
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pager
175.84
KB
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partx
118.23
KB
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66.61
KB
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42.37
KB
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pathchk
38.34
KB
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pdb3
61.27
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61.27
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3.32
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3.32
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pgrep
30.24
KB
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26.38
KB
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71.07
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71.07
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71.07
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pinky
42.37
KB
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152.77
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30.24
KB
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pldd
22.37
KB
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34.24
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pr
74.43
KB
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18.05
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printenv
38.34
KB
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58.34
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38.74
KB
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ps
134.46
KB
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ptx
78.4
KB
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pwd
42.34
KB
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pwdx
14.23
KB
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py3clean
7.63
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py3compile
11.84
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py3versions
11.44
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pydoc3
79
B
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pydoc3.8
79
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pygettext3
21.03
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21.03
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pyjwt3
372
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5.21
MB
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5.21
MB
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1.13
MB
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114.3
KB
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rdma
130.23
KB
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50.34
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50.37
KB
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22.23
KB
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renice
14.23
KB
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30.31
KB
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resizepart
62.23
KB
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resolvectl
126.38
KB
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14.23
KB
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rgrep
30
B
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774.95
KB
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rm
70.37
KB
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rmdir
46.34
KB
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routef
208
B
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1.62
KB
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774.95
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rtstat
30.51
KB
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18.05
KB
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26.51
KB
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38.34
KB
-rwxr-xr-x
rview
1.29
MB
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savelog
10.24
KB
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sbattach
58.48
KB
-rwxr-xr-x
sbkeysync
66.7
KB
-rwxr-xr-x
sbsiglist
58.55
KB
-rwxr-xr-x
sbsign
58.55
KB
-rwxr-xr-x
sbvarsign
66.61
KB
-rwxr-xr-x
sbverify
62.48
KB
-rwxr-xr-x
scp
114.3
KB
-rwxr-xr-x
script
54.23
KB
-rwxr-xr-x
scriptreplay
30.23
KB
-rwxr-xr-x
sdiff
50.09
KB
-rwxr-xr-x
sed
118.45
KB
-rwxr-xr-x
see
18.05
KB
-rwxr-xr-x
select-editor
2.38
KB
-rwxr-xr-x
sensible-browser
1.2
KB
-rwxr-xr-x
sensible-editor
1.14
KB
-rwxr-xr-x
sensible-pager
452
B
-rwxr-xr-x
seq
50.34
KB
-rwxr-xr-x
setarch
26.5
KB
-rwxr-xr-x
setpriv
46.23
KB
-rwxr-xr-x
setsid
14.23
KB
-rwxr-xr-x
setterm
46.23
KB
-rwxr-xr-x
sftp
166.51
KB
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sg
43.73
KB
-rwsr-xr-x
sh
126.77
KB
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sha1sum
50.37
KB
-rwxr-xr-x
sha224sum
58.37
KB
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sha256sum
58.37
KB
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sha384sum
66.37
KB
-rwxr-xr-x
sha512sum
66.37
KB
-rwxr-xr-x
shred
62.37
KB
-rwxr-xr-x
shuf
58.34
KB
-rwxr-xr-x
skill
30.23
KB
-rwxr-xr-x
slabtop
22.23
KB
-rwxr-xr-x
sleep
38.34
KB
-rwxr-xr-x
slogin
774.95
KB
-rwxr-xr-x
snap
16.86
MB
-rwxr-xr-x
snice
30.23
KB
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sort
114.63
KB
-rwxr-xr-x
split
58.77
KB
-rwxr-xr-x
ss
164.84
KB
-rwxr-xr-x
ssh
774.95
KB
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ssh-add
362.28
KB
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ssh-agent
342.29
KB
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ssh-argv0
1.42
KB
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ssh-copy-id
10.41
KB
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ssh-keygen
466.3
KB
-rwxr-xr-x
ssh-keyscan
454.3
KB
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stat
86.37
KB
-rwxr-xr-x
stdbuf
50.34
KB
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stty
82.37
KB
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su
66.23
KB
-rwsr-xr-x
sudo
162.16
KB
-rwsr-xr-x
sudoedit
162.16
KB
-rwsr-xr-x
sudoreplay
63
KB
-rwxr-xr-x
sum
46.34
KB
-rwxr-xr-x
sync
38.34
KB
-rwxr-xr-x
systemctl
973.23
KB
-rwxr-xr-x
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1.55
MB
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systemd-analyze
1.51
MB
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systemd-ask-password
14.34
KB
-rwxr-xr-x
systemd-cat
18.23
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Code Editor : tzselect
#!/bin/bash # Ask the user about the time zone, and output the resulting TZ value to stdout. # Interact with the user via stderr and stdin. PKGVERSION="(Ubuntu GLIBC 2.31-0ubuntu9.14) " TZVERSION="2.31" REPORT_BUGS_TO="<https://bugs.launchpad.net/ubuntu/+source/glibc/+bugs>" # Contributed by Paul Eggert. This file is in the public domain. # Porting notes: # # This script requires a Posix-like shell and prefers the extension of a # 'select' statement. The 'select' statement was introduced in the # Korn shell and is available in Bash and other shell implementations. # If your host lacks both Bash and the Korn shell, you can get their # source from one of these locations: # # Bash <https://www.gnu.org/software/bash/> # Korn Shell <http://www.kornshell.com/> # MirBSD Korn Shell <https://www.mirbsd.org/mksh.htm> # # For portability to Solaris 9 /bin/sh this script avoids some POSIX # features and common extensions, such as $(...) (which works sometimes # but not others), $((...)), and $10. # # This script also uses several features of modern awk programs. # If your host lacks awk, or has an old awk that does not conform to Posix, # you can use either of the following free programs instead: # # Gawk (GNU awk) <https://www.gnu.org/software/gawk/> # mawk <https://invisible-island.net/mawk/> # Specify default values for environment variables if they are unset. : ${AWK=awk} : ${TZDIR=/usr/share/zoneinfo} # Output one argument as-is to standard output. # Safer than 'echo', which can mishandle '\' or leading '-'. say() { printf '%s\n' "$1" } # Check for awk Posix compliance. ($AWK -v x=y 'BEGIN { exit 123 }') </dev/null >/dev/null 2>&1 [ $? = 123 ] || { say >&2 "$0: Sorry, your '$AWK' program is not Posix compatible." exit 1 } coord= location_limit=10 zonetabtype=zone1970 usage="Usage: tzselect [--version] [--help] [-c COORD] [-n LIMIT] Select a timezone interactively. Options: -c COORD Instead of asking for continent and then country and then city, ask for selection from time zones whose largest cities are closest to the location with geographical coordinates COORD. COORD should use ISO 6709 notation, for example, '-c +4852+00220' for Paris (in degrees and minutes, North and East), or '-c -35-058' for Buenos Aires (in degrees, South and West). -n LIMIT Display at most LIMIT locations when -c is used (default $location_limit). --version Output version information. --help Output this help. Report bugs to $REPORT_BUGS_TO." # Ask the user to select from the function's arguments, # and assign the selected argument to the variable 'select_result'. # Exit on EOF or I/O error. Use the shell's 'select' builtin if available, # falling back on a less-nice but portable substitute otherwise. if case $BASH_VERSION in ?*) : ;; '') # '; exit' should be redundant, but Dash doesn't properly fail without it. (eval 'set --; select x; do break; done; exit') </dev/null 2>/dev/null esac then # Do this inside 'eval', as otherwise the shell might exit when parsing it # even though it is never executed. eval ' doselect() { select select_result do case $select_result in "") echo >&2 "Please enter a number in range." ;; ?*) break esac done || exit } # Work around a bug in bash 1.14.7 and earlier, where $PS3 is sent to stdout. case $BASH_VERSION in [01].*) case `echo 1 | (select x in x; do break; done) 2>/dev/null` in ?*) PS3= esac esac ' else doselect() { # Field width of the prompt numbers. select_width=`expr $# : '.*'` select_i= while : do case $select_i in '') select_i=0 for select_word do select_i=`expr $select_i + 1` printf >&2 "%${select_width}d) %s\\n" $select_i "$select_word" done ;; *[!0-9]*) echo >&2 'Please enter a number in range.' ;; *) if test 1 -le $select_i && test $select_i -le $#; then shift `expr $select_i - 1` select_result=$1 break fi echo >&2 'Please enter a number in range.' esac # Prompt and read input. printf >&2 %s "${PS3-#? }" read select_i || exit done } fi while getopts c:n:t:-: opt do case $opt$OPTARG in c*) coord=$OPTARG ;; n*) location_limit=$OPTARG ;; t*) # Undocumented option, used for developer testing. zonetabtype=$OPTARG ;; -help) exec echo "$usage" ;; -version) exec echo "tzselect $PKGVERSION$TZVERSION" ;; -*) say >&2 "$0: -$opt$OPTARG: unknown option; try '$0 --help'"; exit 1 ;; *) say >&2 "$0: try '$0 --help'"; exit 1 ;; esac done shift `expr $OPTIND - 1` case $# in 0) ;; *) say >&2 "$0: $1: unknown argument"; exit 1 ;; esac # Make sure the tables are readable. TZ_COUNTRY_TABLE=$TZDIR/iso3166.tab TZ_ZONE_TABLE=$TZDIR/$zonetabtype.tab for f in $TZ_COUNTRY_TABLE $TZ_ZONE_TABLE do <"$f" || { say >&2 "$0: time zone files are not set up correctly" exit 1 } done # If the current locale does not support UTF-8, convert data to current # locale's format if possible, as the shell aligns columns better that way. # Check the UTF-8 of U+12345 CUNEIFORM SIGN URU TIMES KI. ! $AWK 'BEGIN { u12345 = "\360\222\215\205"; exit length(u12345) != 1 }' && { tmp=`(mktemp -d) 2>/dev/null` || { tmp=${TMPDIR-/tmp}/tzselect.$$ && (umask 77 && mkdir -- "$tmp") };} && trap 'status=$?; rm -fr -- "$tmp"; exit $status' 0 HUP INT PIPE TERM && (iconv -f UTF-8 -t //TRANSLIT <"$TZ_COUNTRY_TABLE" >$tmp/iso3166.tab) \ 2>/dev/null && TZ_COUNTRY_TABLE=$tmp/iso3166.tab && iconv -f UTF-8 -t //TRANSLIT <"$TZ_ZONE_TABLE" >$tmp/$zonetabtype.tab && TZ_ZONE_TABLE=$tmp/$zonetabtype.tab newline=' ' IFS=$newline # Awk script to read a time zone table and output the same table, # with each column preceded by its distance from 'here'. output_distances=' BEGIN { FS = "\t" while (getline <TZ_COUNTRY_TABLE) if ($0 ~ /^[^#]/) country[$1] = $2 country["US"] = "US" # Otherwise the strings get too long. } function abs(x) { return x < 0 ? -x : x; } function min(x, y) { return x < y ? x : y; } function convert_coord(coord, deg, minute, ilen, sign, sec) { if (coord ~ /^[-+]?[0-9]?[0-9][0-9][0-9][0-9][0-9][0-9]([^0-9]|$)/) { degminsec = coord intdeg = degminsec < 0 ? -int(-degminsec / 10000) : int(degminsec / 10000) minsec = degminsec - intdeg * 10000 intmin = minsec < 0 ? -int(-minsec / 100) : int(minsec / 100) sec = minsec - intmin * 100 deg = (intdeg * 3600 + intmin * 60 + sec) / 3600 } else if (coord ~ /^[-+]?[0-9]?[0-9][0-9][0-9][0-9]([^0-9]|$)/) { degmin = coord intdeg = degmin < 0 ? -int(-degmin / 100) : int(degmin / 100) minute = degmin - intdeg * 100 deg = (intdeg * 60 + minute) / 60 } else deg = coord return deg * 0.017453292519943296 } function convert_latitude(coord) { match(coord, /..*[-+]/) return convert_coord(substr(coord, 1, RLENGTH - 1)) } function convert_longitude(coord) { match(coord, /..*[-+]/) return convert_coord(substr(coord, RLENGTH)) } # Great-circle distance between points with given latitude and longitude. # Inputs and output are in radians. This uses the great-circle special # case of the Vicenty formula for distances on ellipsoids. function gcdist(lat1, long1, lat2, long2, dlong, x, y, num, denom) { dlong = long2 - long1 x = cos(lat2) * sin(dlong) y = cos(lat1) * sin(lat2) - sin(lat1) * cos(lat2) * cos(dlong) num = sqrt(x * x + y * y) denom = sin(lat1) * sin(lat2) + cos(lat1) * cos(lat2) * cos(dlong) return atan2(num, denom) } # Parallel distance between points with given latitude and longitude. # This is the product of the longitude difference and the cosine # of the latitude of the point that is further from the equator. # I.e., it considers longitudes to be further apart if they are # nearer the equator. function pardist(lat1, long1, lat2, long2) { return abs(long1 - long2) * min(cos(lat1), cos(lat2)) } # The distance function is the sum of the great-circle distance and # the parallel distance. It could be weighted. function dist(lat1, long1, lat2, long2) { return gcdist(lat1, long1, lat2, long2) + pardist(lat1, long1, lat2, long2) } BEGIN { coord_lat = convert_latitude(coord) coord_long = convert_longitude(coord) } /^[^#]/ { here_lat = convert_latitude($2) here_long = convert_longitude($2) line = $1 "\t" $2 "\t" $3 sep = "\t" ncc = split($1, cc, /,/) for (i = 1; i <= ncc; i++) { line = line sep country[cc[i]] sep = ", " } if (NF == 4) line = line " - " $4 printf "%g\t%s\n", dist(coord_lat, coord_long, here_lat, here_long), line } ' # Begin the main loop. We come back here if the user wants to retry. while echo >&2 'Please identify a location' \ 'so that time zone rules can be set correctly.' continent= country= region= case $coord in ?*) continent=coord;; '') # Ask the user for continent or ocean. echo >&2 'Please select a continent, ocean, "coord", or "TZ".' quoted_continents=` $AWK ' BEGIN { FS = "\t" } /^[^#]/ { entry = substr($3, 1, index($3, "/") - 1) if (entry == "America") entry = entry "s" if (entry ~ /^(Arctic|Atlantic|Indian|Pacific)$/) entry = entry " Ocean" printf "'\''%s'\''\n", entry } ' <"$TZ_ZONE_TABLE" | sort -u | tr '\n' ' ' echo '' ` eval ' doselect '"$quoted_continents"' \ "coord - I want to use geographical coordinates." \ "TZ - I want to specify the timezone using the Posix TZ format." continent=$select_result case $continent in Americas) continent=America;; *" "*) continent=`expr "$continent" : '\''\([^ ]*\)'\''` esac ' esac case $continent in TZ) # Ask the user for a Posix TZ string. Check that it conforms. while echo >&2 'Please enter the desired value' \ 'of the TZ environment variable.' echo >&2 'For example, AEST-10 is abbreviated' \ 'AEST and is 10 hours' echo >&2 'ahead (east) of Greenwich,' \ 'with no daylight saving time.' read TZ $AWK -v TZ="$TZ" 'BEGIN { tzname = "(<[[:alnum:]+-]{3,}>|[[:alpha:]]{3,})" time = "(2[0-4]|[0-1]?[0-9])" \ "(:[0-5][0-9](:[0-5][0-9])?)?" offset = "[-+]?" time mdate = "M([1-9]|1[0-2])\\.[1-5]\\.[0-6]" jdate = "((J[1-9]|[0-9]|J?[1-9][0-9]" \ "|J?[1-2][0-9][0-9])|J?3[0-5][0-9]|J?36[0-5])" datetime = ",(" mdate "|" jdate ")(/" time ")?" tzpattern = "^(:.*|" tzname offset "(" tzname \ "(" offset ")?(" datetime datetime ")?)?)$" if (TZ ~ tzpattern) exit 1 exit 0 }' do say >&2 "'$TZ' is not a conforming Posix timezone string." done TZ_for_date=$TZ;; *) case $continent in coord) case $coord in '') echo >&2 'Please enter coordinates' \ 'in ISO 6709 notation.' echo >&2 'For example, +4042-07403 stands for' echo >&2 '40 degrees 42 minutes north,' \ '74 degrees 3 minutes west.' read coord;; esac distance_table=`$AWK \ -v coord="$coord" \ -v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \ "$output_distances" <"$TZ_ZONE_TABLE" | sort -n | sed "${location_limit}q" ` regions=`say "$distance_table" | $AWK ' BEGIN { FS = "\t" } { print $NF } '` echo >&2 'Please select one of the following timezones,' \ echo >&2 'listed roughly in increasing order' \ "of distance from $coord". doselect $regions region=$select_result TZ=`say "$distance_table" | $AWK -v region="$region" ' BEGIN { FS="\t" } $NF == region { print $4 } '` ;; *) # Get list of names of countries in the continent or ocean. countries=`$AWK \ -v continent="$continent" \ -v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \ ' BEGIN { FS = "\t" } /^#/ { next } $3 ~ ("^" continent "/") { ncc = split($1, cc, /,/) for (i = 1; i <= ncc; i++) if (!cc_seen[cc[i]]++) cc_list[++ccs] = cc[i] } END { while (getline <TZ_COUNTRY_TABLE) { if ($0 !~ /^#/) cc_name[$1] = $2 } for (i = 1; i <= ccs; i++) { country = cc_list[i] if (cc_name[country]) { country = cc_name[country] } print country } } ' <"$TZ_ZONE_TABLE" | sort -f` # If there's more than one country, ask the user which one. case $countries in *"$newline"*) echo >&2 'Please select a country' \ 'whose clocks agree with yours.' doselect $countries country=$select_result;; *) country=$countries esac # Get list of timezones in the country. regions=`$AWK \ -v country="$country" \ -v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \ ' BEGIN { FS = "\t" cc = country while (getline <TZ_COUNTRY_TABLE) { if ($0 !~ /^#/ && country == $2) { cc = $1 break } } } /^#/ { next } $1 ~ cc { print $4 } ' <"$TZ_ZONE_TABLE"` # If there's more than one region, ask the user which one. case $regions in *"$newline"*) echo >&2 'Please select one of the following timezones.' doselect $regions region=$select_result;; *) region=$regions esac # Determine TZ from country and region. TZ=`$AWK \ -v country="$country" \ -v region="$region" \ -v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \ ' BEGIN { FS = "\t" cc = country while (getline <TZ_COUNTRY_TABLE) { if ($0 !~ /^#/ && country == $2) { cc = $1 break } } } /^#/ { next } $1 ~ cc && $4 == region { print $3 } ' <"$TZ_ZONE_TABLE"` esac # Make sure the corresponding zoneinfo file exists. TZ_for_date=$TZDIR/$TZ <"$TZ_for_date" || { say >&2 "$0: time zone files are not set up correctly" exit 1 } esac # Use the proposed TZ to output the current date relative to UTC. # Loop until they agree in seconds. # Give up after 8 unsuccessful tries. extra_info= for i in 1 2 3 4 5 6 7 8 do TZdate=`LANG=C TZ="$TZ_for_date" date` UTdate=`LANG=C TZ=UTC0 date` TZsec=`expr "$TZdate" : '.*:\([0-5][0-9]\)'` UTsec=`expr "$UTdate" : '.*:\([0-5][0-9]\)'` case $TZsec in $UTsec) extra_info=" Selected time is now: $TZdate. Universal Time is now: $UTdate." break esac done # Output TZ info and ask the user to confirm. echo >&2 "" echo >&2 "The following information has been given:" echo >&2 "" case $country%$region%$coord in ?*%?*%) say >&2 " $country$newline $region";; ?*%%) say >&2 " $country";; %?*%?*) say >&2 " coord $coord$newline $region";; %%?*) say >&2 " coord $coord";; *) say >&2 " TZ='$TZ'" esac say >&2 "" say >&2 "Therefore TZ='$TZ' will be used.$extra_info" say >&2 "Is the above information OK?" doselect Yes No ok=$select_result case $ok in Yes) break esac do coord= done case $SHELL in *csh) file=.login line="setenv TZ '$TZ'";; *) file=.profile line="TZ='$TZ'; export TZ" esac test -t 1 && say >&2 " You can make this change permanent for yourself by appending the line $line to the file '$file' in your home directory; then log out and log in again. Here is that TZ value again, this time on standard output so that you can use the $0 command in shell scripts:" say "$TZ"
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