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Linux User Administration

• Create User
• Modify User
  • Add User to Group
  • Delete User from Group
  • Change Default Group

Create User

useradd -s /bin/bash -G users,staff,cdrom -g staff -m winston
passwd winston

• -s /bin/bash Default shell will be /bin/bash.
• -G users,staff,cdrom List of groups winston will be belong to.
• -g staff winston will belong to the staff group by default.
• -m Create their home directory and put default stuff from /etc/skel in there.

Modify User

Add User to Group

gpasswd -a winston svnuser
# Add winston to the svnuser group.

Delete User from Group

gpasswd -d winston user
# Remove winston from the user group.

Change Default Group

# as root:
usermod -g users winston
# as the user himself:
newgrp staff