Useradd

useradd - create a new user or update default new user information

• Man page: https://linux.die.net/man/8/useradd

useradd -m YOUR_USERNAME -s /bin/bash
        -m --create-home

useradd -m YOUR_USERNAME --uid #### --gid #### -s /bin/bash --create-home

Add user using Ansible

 - user:
     name: YOUR_USER_NAME
     shell: /bin/bash
     groups: sudo
     append: yes
     password_lock: yes

Add user using bash

Example creating a user in Ubuntu with bash shell, ~/.ssh directory and part of group sudo using useradd command:

#!/bin/bash
USERNAME="Your_user_name"

# Create user and add to sudo group
  useradd  --create-home -s /bin/bash $USERNAME
  sudo usermod -aG sudo $USERNAME 

#Create ssh directory and lock password login
  mkdir /home/$USERNAME /home/$USERNAME/.ssh
  chown $USERNAME.$USERNAME /home/$USERNAME /home/$USERNAME/.ssh 
  passwd -l $USERNAME 

passwd -l $USERNAME // for disabling password login

passwd -u $USERNAME // will unlock account if needed

After creating user you can copy ssh key using ssh-copy-id and modifying sudo for giving new user privileges.

useradd command

useradd command.

-m --create-home
-M, --no-create-home
-N, --no-user-group
-s --shell

useradd -m YOUR_USERNAME -s /bin/bash

You can also consider activating passwordless sudo for your accounts.

Related commands

• jailkit, ChrootDirectory
• passwd
• userdel, usermod
• adduser (BusyBox)
• groups, chgrp
• Cisco IOS: username
• Sftp configuration
• FreeIPA: ipa user-add
• macOS:
  • sysadminctl -addUser USERNAME
  • dscl . -create /Users/USERNAME_HERE

• ~/.ssh/
• Cisco IOS: Associate a user with default higher privileges: username
• CREATE ROLE

See also

• macOS: sysadminctl
• sudo, id, visudo, useradd, userdel, usermod, groups, passwd, chown, chmod, chgrp, groupadd, groupdel, Passwordless sudo, passwd (package), sudo --help
• OpenSSH (changelog): /etc/ssh/sshd_config | /etc/ssh/ssh_config | ~/.ssh/ | openSSL | sshd logs | sftp | scp | authorized_keys | ssh-keygen | ssh-keyscan | ssh-add | ssh-agent | ssh | Ssh -O stop | ssh-copy-id | CheckHostIP | UseKeychain, OpenSSF
• Ansible: User ssh access
• groups or id commands to list groups of a user. sudo usermod -a -G root USERNAME

https://linux.die.net/man/8/useradd

http://man7.org/linux/man-pages/man8/useradd.8.html

http://man7.org/linux/man-pages/man8/useradd.8.html