SIMULATION -
Create the following users, groups, and group memberships:
A group named adminuser.
A user natasha who belongs to adminuser as a secondary group A user harry who also belongs to adminuser as a secondary group.
A user sarah who does not have access to an interactive shell on the system, and who is not a member of adminuser, natasha, harry, and sarah should all have the password of redhat.
The correct series of commands for this task is as follows: First, you need to create a group named 'adminuser'. The command for this is 'groupadd adminuser'. Next, you need to create the users natasha and harry, adding them to the 'adminuser' group as a secondary group. The command for natasha is 'useradd -G adminuser natasha' and for harry it is 'useradd -G adminuser harry'. For the user sarah, who should not have access to an interactive shell, use the command 'useradd -s /sbin/nologin sarah'. To set the password 'redhat' for each user, use the command 'echo redhat | passwd --stdin natasha', 'echo redhat | passwd --stdin harry', and 'echo redhat | passwd --stdin sarah'.
Full solution: # groupadd adminuser # useradd -aG adminuser natasha # useradd -aG adminuser harry # useradd -s /sbin/nologin sarah # echo 'redhat' | passwd --stdin natasha # echo 'redhat' | passwd --stdin harry # echo 'redhat' | passwd --stdin sarah
This is correct. On the useradd -s, "-s" is for "shell."
what is the a in -aG for? Help page for useradd has no mention of -a option.