usermod

Modify a user account. See also: users, useradd, userdel. More information: https://manned.org/usermod.

• Change a username:

sudo usermod -l|–login new_username username

• Change a user ID:

sudo usermod -u|–uid id username

• Change a user shell:

sudo usermod -s|–shell path/to/shell username

• Add a user to supplementary groups (mind the lack of whitespace):

sudo usermod -a|–append -G|–groups group1,group2,… username

• Change a user home directory:

sudo usermod -m|–move-home -d|–home path/to/new_home username