Linux Account Management, user and group user account commands useradd add new user account usermod Set User Account Information userdel delete user account passwd Change User Account Password chage Change User Account Password life finger show User Account Information chfn Change User Account real information chsh Change User Account Login shellid show User Account UID and GIDgroups show all group names of the user newgrp Change User's current valid group su switch user account w or who view currently logged-on account information last view recently logged-on account information lastlog view the recent logged-on information of each account group account command groupadd Add add new group account groupmod set group account information groupdel Delete set the Group Administrator for the group account gpasswd, related Files/etc/passwd User Account Information/etc/shadow user account password information/etc/group information/etc/gshadow group security information can be used to create a group administrator/etc/ default/useradd default settings/etc/login. defs User Account Logon Settings/etc/skel/* User home reference baseline directory