Create a group called foo and add user tom to a secondary group called foo:
$ sudo groupadd foo
$ sudo useradd -G foo tom
OR
# groupadd foo
# useradd -G foo tom
Verify new settings:
id tom groups tom |
Finally, set the password for tom user, enter:
$ sudo passwd tom
OR
# passwd tom
You can add user tom to multiple groups – foo, bar, and ftp, enter:
# useradd -G foo,bar,ftp tom
Ubuntu Linux: add a existing user to existing group
To add an existing user jerry to ftp supplementary/secondary group with usermod command using -a option ~ i.e. add the user to the supplemental group(s). Use only with -G option:
usermod -a -G ftp jerry id jerry |
To change existing jerry’s primary group to www, enter:
usermod -g www jerry |