Script to truncats logs

[Ashley_22]

I require a script ( or command) to check a log file and truncate it only if its size is more than 500MB.

[harry d brown jr]

What do you mean by "truncate"? Do you waht to lop off the top of the log file, the bottom, or cat /dev/null to it and really truncate it?

What kind of log file are we talking about?

truncating log files is complicated, so I suggest LOG ROTATION.

live free or die
harry d brown jr

[renarios]

Hi Asley,

Try this:
#!/bin/sh
#Find all logfiles bigger than 500MB (524288000 bytes) and "flush them"
for i in $(find -name '*.log' -size +524288000c)
do
cat /dev/null > $i
done


cheerio,

Renarios

[Pete Randall]

If you choose to try rotating, here's the tool:

http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/logrotate-2.5/


Pete

[Steven E. Protter]

I like logrotate.

Its a standard on Linux and works well for me on those servers.

> name_of_logfile

Will instantly empty any log.

To get that list you run a find command.

find /var -size +500 > /tmp/list

while read -r filename
do
> $filename
done < /tmp/list

SEP