What does groupadd command do in Linux?

The groupadd command creates a new group account using the values specified on the command line plus the default values from the system. The new group will be entered into the system files as needed.

How do I use adduser?

Follow these steps to add an existing user to a group in Linux:

  1. Log in as root.
  2. Use the command useradd “name of the user” (for example, useradd roman)
  3. Use su plus the name of the user you just added to log on.
  4. “Exit” will log you out.

How do I add a user to the root group in Linux?

Open the terminal and then type:

  1. Add a new user called jerry to secondary group named cartoons on Linux: sudo useradd -G cartoons jerry.
  2. Want to add a new user called tom to primary group called cartoons? Run:
  3. We can add a existing user named spike to existing group named cartoons in Linux: sudo useradd -g cartoons spike.

How do you do groupadd?

To create a new group type groupadd followed by the new group name. The command adds an entry for the new group to the /etc/group and /etc/gshadow files. Once the group is created, you can start adding users to the group .

How do I install adduser on Linux?

  1. adduser command in Linux is used to add a new user to your current Linux machine.
  2. In case of Debian/Ubuntu.
  3. In case of CentOS/RedHat $sudo yum install adduser.
  4. In case of Fedora OS $sudo dnf install adduser.
  5. To add a new user adduser username.
  6. To add a user with a different shell.

How do I login as root in Linux?

Switching to the root user on my Linux server

  1. Enable root/admin access for your server.
  2. Connect via SSH to your server and run this command: sudo su –
  3. Enter your server password. You should now have root access.

How do I find the root user in Linux?

How to get root access on Linux operating system?

  1. Please click on the lower left corner of the icon (start button).
  2. Click Terminal menu item to open the terminal.
  3. Input the command below: % sudo su –
  4. Press Enter.
  5. Your terminal prompt will become #.
  6. You now have root privleges on all operations in the terminal window.