Users and Groups

Ø  groupadd groupName -: to create a group
Ø  useradd -G groupName userName -: to add a user to the related group
Ø  passwd userName  -: set a password to the related user
Ø  usermod -a -G  groupName userName -: to add a existing user to a existing group
Ø  login
press “Enter”
give username and password -: to login as related user
Ø  logout -: logout from the user
Ø  grep groupName /etc/group -: to search a group

Ø  userdel userName  -: to remove a user
Ø  groupdel groupName -: to remove a group