UNIX for Dummies Questions & Answers

Is there a place were the system stores logs of command's? like does it log whatever changes I made?

I'm using a Centos 5.x box

Thank you

Not normally. UNIX does keep a history file of your recent commands. The fc command for your system can recall commands recently issued. The file itself is indentifed in the environment variable HISTFILE

Code:

echo $HISTFILE

All of this is predicated on you using a modern, POSIX shell. If your shell is ancient, I cannnot tell you what to do. I'm guessing you are using bash, which is POSIX-compliant, since CentOS 5.1 is the current release.

ok right I was able to use this to bring up previous commands.
what i was trying to do was find an ip address that i had pinged yesterday. but im guessing if the server is rebooted that that history is lost.