su -- substitute user identity. The su utility requests appropriate user credentials via PAM and switches to that user ID (the default user is the superuser). A shell is then executed.... Read More

Using netstat to list established connections on UNIX (BSD, Linux) boxes... Read More

Tired of "You have new mail in /var/mail/root (or other user)" messages on your FreeBSD box's shell prompt ?? Well this is how to change your environment variable $MAIL.... Read More