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Dealing with Users and Groups

You can use the following commands to administer users and groups.

  • adduser: The adduser command creates a new user. To create a new user, simply type sudo adduser $ loginname . This creates the user's home directory and default group. It prompts for a user password and then further details about the user.
  • passwd: The passwd command changes the user's password. If run by a regular user, it will change his or her password. If run using sudo, it can change any user's password. For example, sudo passwd joe changes Joe's password.
  • who: The who command tells you who is currently logged into the machine.
  • addgroup: The addgroup command adds a new group. To create a new group, type sudo addgroup $groupname .
  • deluser: The deluser command removes a user from the system. To remove the user's files and home directory, you need to add the -remove-home option.
  • delgroup: The delgroup command removes a group from the system. You cannot remove a group that is the primary group of any users.
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