=====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 | ^ command ^ options ^ Result ^ | groupadd | |creates a new group | | groupadd | -r | creates a system group | | groupmod | -g | change gui for the group | details of gui numbers is stored in /etc/login.defs under SYS_GYD