Opbzil

User Management

command	options	Result
useradd		creates a new user
usermod	-u	used to specify the new users user id
usermod	-d	used to specify the new users home directory
usermod	-c	used to add a comment detail about new user
usermod	-L	locks the user account
usermod	-g	changes the prtimary group of a user
usermod	-G	this changes the the secondary groups of a user
usermod	-aG	this will append groups to the suplimentary groups

use Lock rather than delete as it does not delete files owned by that user

Issue is if a user is deleted the home directory stays but next new user will have ownership of it

command	options	Result
userdel		deletes user keeps all files
userdel	-r	deletes the user and the users home directory

YOU can find directories with no know user details with

 find / --nouser --o nogroup 2>/dev/null

command	options	Result
passwd	-S	shows status of the passsword for a user

details of gui numbers is stored in /etc/login.defs under SYS_GYD