adduser $ sudo adduser testuser Adding user `testuser' ... Adding new group `testuser' (1001) ... Adding new user `testuser' (1001) with group `testuser' ... Creating home directory `/home/testuser' ... Copying files from ` /etc/skel ' ... Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully Changing the user information for testuser Enter the new value, or press ENTER for the default Full Name []: thisisjustatest Room Number []: Work Phone []: Home Phone []: Other []: Is the information correct? [y/N] y useradd $ sudo useradd -d /home/testuser -m [ username ] -d : set home directory -m : create home directory [ -g : existed_group ( default : groupname = username ) ] delete user $ userdel -r testuser -r คือ ให้ลบ Home Directory too groupadd groupdel change the password $ sudo passwd [ username ] Add user to sudoer file $ sudo adduser <username> sudo user group that should be added - adm - ...