how to rotate a log file when it reaches a particular size

[Nosia]

Hello
i want to rotate a log file called test.log, the rotation must be done when the file reaches a particular size say 100 kb. i know that for weekly and daily we just write weekly / daily but
the problem is that i don't know the command syntax that make the rotation happens when my file reaches 100 kb.
note: i have opened /etc/logrotate.d/rsyslog and added the directory in which my log file resides.
please help quickly..

[sicarie]

It sounds like you're already on the right path - I'd use logrotate set up like one of the many examples here.

It sounds like there is a size option, so if you set the entry as (inside logrotate file):

/path/to/test.log {
    size 100k
    create 0700 root root #or whatever user you want
    rotate 7 #or however many you want to keep
}
 

[Nosia]

sicarie thank you very much.......
yes i was on the right way and i tried the syntax "size 100k"
and it had to work but i didn't restart the service to recognize the change i've made in rsyslog file, that is why the service did not rotate my log file...and at that moment i thought it may be because of syntax error in my file...
i am working under ubuntu 12.4 and it doesn't have a service of kind logrotate so the user have to force the confegration file to read the change..

[sicarie]

Ah, good catch - glad you figured it out!