useradd command examples

– To create/add new users into the system, Linux has a useradd command.

– useradd provides many options for creating users, we can create local, system or superusers using it.

– It comes from “shadow-utils-4.1.4.2” package, we have covered almost all the options here.

Examples: 

1. Adding the user with the default settings                  # useradd mike

2. To add the user with mentioning comments                  # useradd -c “Anything” mike

3. To add user with mentioning home directory                  # useradd -d /tmp/mike mike

4. To add user with expiration date                  # useradd -e 2013-12-31 mike

5. To add user account with number of days of inactivity                  # useradd -f 2 mike

6. To add user with specifying primary group to it                  # useradd -g UNIX mike

7. To add user with  mentioning secondary groups to it                  # useradd -G Support, IT mike

8. To add user while home directory will not be created for it                  # useradd -M mike

9. To create a user with duplicate UID                  # useradd -u 500 -o mike

10. To create a system account                 # useradd -r mike

11. Creating user with assigning specific shell to him                 # useradd -s /bin/bash mike

12. Creating user with particular user ID                 # useradd -u 521 mike

Related Commands: chfn, chsh, passwd, crypt, groupadd, groupdel, groupmod, login.defs, newusers, userdel, usermod.