The true delight is in the finding out rather than in the knowing. — Isaac Asimov

/etc/rc.d/rc.local          // add user scripts: modprobe etc....
 
cat /proc/cpuinfo  // list cpuinfo linux
 
pkg_deinstall -fP
 
adduser(8) 	//The recommended command-line application for adding new users.
rmuser(8) 	//The recommended command-line application for removing users.
chpass(1) 	//A flexible tool to change user database information.
passwd(1) 	//The simple command-line tool to change user passwords.
pw(8) 	//A powerful and flexible tool to modify all aspects of user accounts.