- Appendix A. Welcome to the Command Line
- Starting Up the Terminal
- Moving Around the Filesystem
- Manipulating Files and Folders
- System Information Commands
- Searching and Editing Text Files
- Dealing with Users and Groups
- Getting Help on the Command Line
- Searching for Man Files
- Using Wildcards
- Executing Multiple Commands
- Moving to More Advanced Uses of the Command Line
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.