Quick clean up log files
Happens that a log file might get large and we need a clean start so we use the bash's trucate option >
Using echo "test" > file" will delete the file's content and put "test" in it while the double >>` will append "test" at the end of it, leaving the content intact.
So the way of doing it would be:
cd /var/log
cat /dev/null > messages
cat /dev/null > syslog
cat /dev/null > wtmp
This can be extended to quickly cleanup any type of logs (apache, squid etc)