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