In a document created by a former coworker there is this command:
cat /dev/null > /var/spool/mail/root
It says next to it that it will clean out mailbox.
Can someone please explain how/why these commands do that. I need to know what will happen before I run the command.
We are trying to clean up space on var, as of right now it's at 91%.
/var/spool/mail/root
– Milind Dumbare Mar 11 '15 at 15:30