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Old 05-31-2012, 06:33 AM   #1
jeetvishav
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Symbolic link in linux


I have created a link , it shows that there is link . But it seems like that it is inactive. how i can make it active.
 
Old 05-31-2012, 06:39 AM   #2
acid_kewpie
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there is no such thing as an "inactive" link. What do you mean by this? There is certainly no action ever performed to a symlink. it either points to a real file or it doesn't.
 
Old 05-31-2012, 06:59 AM   #3
jeetvishav
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sir i have created a link of /usr/share/zoneinfo/asia/calcutta /etc/localtime. Link has been created. while i view it shows a blank in Localtime and while i view it by ls -l localtime, it show link but it show unhighlighted /usr/share/zoneinfo/asia/calcutta .
 
Old 05-31-2012, 07:23 AM   #4
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that sounds just fine to me. a link in a coloured ls output should be light blue on black, and its target just normal white on black.
 
Old 05-31-2012, 08:06 AM   #5
jeetvishav
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Thanks.

[root@erpt etc]# ls -l localtime
lrwxrwxrwx 1 root root 33 May 31 15:38 localtime -> /usr/share/zoneinfo/Asia/Calcutta

Color of 'localtime' is cyan and color of '/usr/share/zoneinfo/Asia/Calcutta' is grey. But the color of "/usr/share/zoneinfo/Asia/Calcutta" should be GREEN.

Sir, I am created link , but still LOCALTIME is empty. and i have found the difference between linked file as above. Please advise me why it is so. I need your help desperately.
 
Old 05-31-2012, 08:12 AM   #6
pan64
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can you please show us how did you create that link (exactly)
 
Old 05-31-2012, 08:12 AM   #7
acid_kewpie
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again, this all looks fine to me. I can't see anything to provide help with. The colour should NOT be green. green on an ls output is an executable file. zoneinfo files are NOT executable.

what happens if you run "diff /etc/localtime /usr/share/zoneinfo/Asia/Calcutta" if there is no output, then the files are the same, meaning that the link is working perfectly.
 
Old 06-01-2012, 04:19 AM   #8
jeetvishav
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@pan64

@pan64

Intially i had changed the time in graphical mode on Linux. Thereafter when i prompted the DATE command . I found that time is being shown in UTC. Then i remove the file /etc/localtime by taking its backup. I have created a symbolic link as follow :

#ln -sf /usr/share/zoneinfo/Asia/Calcutta /etc/localtime
#hwclock --systohc

But still it is showing the time in UTC. Moreover i have tried to see the contents /etc/localtime. It is empty. (I have another server/machine , in which time is in IST and when i view the /etc/localtime, it does how some data in it. )

I have few queries : 1. Why /etc/localtime is empty?
2. Does DATE command read from etc/localtime or not?
Please assist me.
 
Old 06-01-2012, 04:21 AM   #9
acid_kewpie
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please answer the questions I asked
 
Old 06-01-2012, 04:27 AM   #10
pan64
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Can you check what acid_kewpie asked?
see man page of date:
Quote:
Environment

TZ
Specifies the timezone, unless overridden by command line parameters. If neither is specified, the setting from /etc/localtime is used.
you can check it with strace.


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Old 06-01-2012, 04:40 AM   #11
jeetvishav
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@acid_kewpie
i have run on prompt, there is no output.
 
Old 06-01-2012, 04:44 AM   #12
acid_kewpie
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right so no output means the files are the same, so the real file is also blank... Maybe you overwrote it somehow?
 
Old 06-01-2012, 04:50 AM   #13
jeetvishav
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@pan64, sir i hv explained you what i did. Now pls advise me way out to bring the time in IST
 
Old 06-01-2012, 04:55 AM   #14
jeetvishav
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@acid_kewpie, may be.. it has been overwritten. i also tried to change the Timezone with SETUP command.
 
Old 06-01-2012, 05:01 AM   #15
pan64
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you need to restore that file I think. probably you need to reinstall the package (just I do not know what kind of OS you have)
 
  


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