tail error_log

//or for the last 15 or whatever lines

tail -15 error_log

http://www.wallpaperama.com/forums/how-to-display-show-get-last-10-lines-from-a-file-in-linux-shell-command-t915.html

Handy, especially when you have large logs and you want to see what just happened

Display last 10 lines of log

Bash

Bash