usermod : modify a user account
[SYNOPSIS] usermod OPTION USER
OPTION
-c COMMENT new value of the GECOS field
-d HOME_DIR new home directory for the user account
-e EXPIRE_DATE set account expiration date to EXPIRE_DATE
-f INACTIVE set password inactive after expiration to INACTIVE
-g GROUP force use GROUP as new primary group
-G GROUPS new list of supplementary GROUPS
-a append the user to the supplemental GROUPS mentioned by the -G option without removing the user from other groups
-h display help message and exit
-l NEW_LOGIN new value of the login name
-L lock the user account
-m move contents of the home directory to the new location (use only with -d)
-o allow using duplicate (non-unique) UID
-p PASSWORD use encrypted password for the new password
-R CHROOT_DIR directory to chroot into
-P PREFIX_DIR prefix directory where are located the /etc/* files
-s SHELL new login shell for the user account
-u UID new UID for the user account
-U unlock the user account
-v FIRST-LAST add range of subordinate uids
-V FIRST-LAST remove range of subordinate uids
-w FIRST-LAST add range of subordinate gids
-W FIRST-LAST remove range of subordinate gids
-Z SEUSER new SELinux user mapping for the user account