Sudo Logging

From openSUSE

By default, sudo logs to /var/log/messages. This can be changed in two ways.

Add the following to the /etc/sudoers file in the "Defaults" section.

sudo /usr/sbin/visudo
Defaults loglinelen=0 # disable line wrapping in log.
Defaults logfile=/var/log/sudo.log # or some other filename.

Save and exit vi (:wq) and run 'sudo -l' to test, then check /var/log/sudo.log.