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Old 11-11-2010, 11:37 AM   #1
joesto
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Registered: Jun 2010
Location: liverpool GB
Distribution: ubuntu 10.4
Posts: 18

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Question how to unlock a log file and?


hi all
how do i unlock a log file so i can clear its contents?
and how do i get the list in the log file to open the listing so the latest entry is at the top?
thanks
joe
 
Old 11-11-2010, 11:46 AM   #2
GrapefruiTgirl
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Registered: Dec 2006
Location: underground
Distribution: Slackware64
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Hi there!

Not sure what you mean by "lock" or "unlock" the files. Sounds like you are trying to do things to log files that you do not have permissions to do. Most or all log files are owned by root , so you'll need to be root (or use `sudo`) to remove or clear such files.

As for "open the listing so the latest entry is at the top", again this is slightly unclear, but maybe try:
Code:
tac logfile | less
that may work. If not, someone will have another suggestion, though you may need to clarify exactly what you mean.

Cheers!

EDIT; Oh, P.S. you should ideally have the `logrotate` program being run by cron or something on your system, which should take care of rotating and clearing logs automatically for you. Perhaps you ought to investigate this. Just a suggestion.

Last edited by GrapefruiTgirl; 11-11-2010 at 11:48 AM.
 
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Old 11-11-2010, 12:05 PM   #3
joesto
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Registered: Jun 2010
Location: liverpool GB
Distribution: ubuntu 10.4
Posts: 18

Original Poster
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Thumbs up

thanks celine understood i have changed the own to myself now and i can del. its contents

as for the listing

in the log file as a couple of lines foe example


this lie 20pm
this line 21pm
this line 22pm
and so on
when i opem the logfile i would lke to have the last entry first for example
this line 22pm
this line 21pm
this line 20pm
as you can see if the listing is very long i have to scroll down to see the lastest entry
hope that explains it
thanks
joe
 
Old 11-11-2010, 12:10 PM   #4
GrapefruiTgirl
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Registered: Dec 2006
Location: underground
Distribution: Slackware64
Posts: 7,594

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Yup, that explains it. Try the command I suggested. You probably need to use `sudo` for that too. Does it work?

Also, if you just want to see the last few lines, use the `tail` command. See:
Code:
man tail
for details.

Last edited by GrapefruiTgirl; 11-11-2010 at 12:11 PM.
 
  


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