sudo usermod -aG sudo <username>
usermod -a -G YOUR_GROUP YOUR_USERNAME
usermod -s /usr/sbin/nologin myuser
ssh and scp will fail
groups USERNAME
Related commands
See also
sudo, id, visudo, useradd, userdel, usermod, groups, passwd, chown, chmod, chgrp, groupadd, groupdel, Passwordless sudo, passwd (package), sudo --help
