How to add users to Ubuntu?

The current operating systems stand out for being multi-user. That is, they can create many users with different usage profiles. This allows the same system to be used by different people. But also, it is possible to create specific system users for certain network services or applications. In any case, thanks to this post you will learn how to add users to Ubuntu.

In this tutorial, we will use the terminal, so you can use it if you have a server or use the system with a graphical interface.

The Linux useradd command

In Ubuntu, the command to create a new user is useradd. This command is quite easy to use but has some options that allow you to customize the creation.

Open a terminal and run this command to get information about useradd:

useradd --help

And you will get a screen output like the one below:

Usage: useradd [options] LOGIN
       useradd -D
       useradd -D [options]

Options:
  -b, --base-dir BASE_DIR       base directory for the home directory of the
                                new account
  -c, --comment COMMENT         GECOS field of the new account
  -d, --home-dir HOME_DIR       home directory of the new account
  -D, --defaults                print or change default useradd configuration
  -e, --expiredate EXPIRE_DATE  expiration date of the new account
  -f, --inactive INACTIVE       password inactivity period of the new account
  -g, --gid GROUP               name or ID of the primary group of the new
                                account
  -G, --groups GROUPS           list of supplementary groups of the new
                                account
  -h, --help                    display this help message and exit
  -k, --skel SKEL_DIR           use this alternative skeleton directory
  -K, --key KEY=VALUE           override /etc/login.defs defaults
  -l, --no-log-init             do not add the user to the lastlog and
                                faillog databases
  -m, --create-home             create the user's home directory
  -M, --no-create-home          do not create the user's home directory
  -N, --no-user-group           do not create a group with the same name as
                                the user
  -o, --non-unique              allow to create users with duplicate
                                (non-unique) UID
  -p, --password PASSWORD       encrypted password of the new account
  -r, --system                  create a system account
  -R, --root CHROOT_DIR         directory to chroot into
  -s, --shell SHELL             login shell of the new account
  -u, --uid UID                 user ID of the new account
  -U, --user-group              create a group with the same name as the user
  -Z, --selinux-user SEUSER     use a specific SEUSER for the SELinux user mapping
      --extrausers              Use the extra users database

From it, we can get the basic syntax of the command:

useradd [options] [username]

This command needs to be executed as root user. Or at least in addition to the sudo command.

We will now examine the most common options for this command.

Adding Users in Ubuntu with useradd

To add a user in Ubuntu, just execute the following command:

sudo useradd [username]

If you want to create a new user called atechtown, it would be as follows:

sudo useradd atechtown

However, we will be able to make use of options to improve the creation.

As you know the user that the system creates by default, has assigned a home folder, to assign one, you must add the option -m

sudo useradd -m atechtown

This will create the new user and assign the /home/atechtown directory as the home

Also, you can directly set what you want the Home address to be. In this case, the option to use is the -d

sudo useradd -d [directory] atechtown

For example:

sudo useradd -d /opt/atechtown atechtown

Sometimes it is convenient to create a user and not his personal folder. This is useful if we create a user dedicated to some service of the system. For this, the -M option is the right one.

sudo useradd -M atechtown

Another very useful thing is to create the new user and once assigned to the main group of users and once added to secondary groups as sudo.

In this case, to assign it to a primary group we use the option -g and for secondary groups -G

For example:

useradd -g users -G sudo,adm atechtown

What if it’s time to create an account that we know is temporary? Well, the useradd command has the -e option that defines a date on which the account will expire.

For example:

sudo useradd -e 2020-12-30 atechtown

This indicates that the account will expire on December 30, 2020. Fabulous, isn’t it?

If you have several shells in the system like zsh you can specify which one the new user will use. This is what the -s option is for.

sudo useradd -s /usr/bin/zsh atechtown

Remember that all the options I have taught you can be combined into one command.

Now that the user is created, you have to assign him a password. You can do this with the passwd command.

sudo passwd [username]

In our case:

sudo passwd atechtown

There you will have to define a password and confirm it. Now you know how to add and create users in Ubuntu.

Conclusion

Adding users to a system like Ubuntu can be a basic task but is always useful on purchased computers. However, this not only applies when Ubuntu is used on a desktop system but also at the server level.

For more information about the useradd command, you can check this link.

Also, we invite you to read our post about the rsync command.

Share This: