How to run sudo command without a password on a Linux or Unix

To run the sudo command without a password on a Linux or Unix system, you can add the user to the sudo group and configure the sudoers file to allow the user to run the sudo command without a password.

1. Add the user to the sudo group:

The sudo group is a special group that is granted the ability to run the sudo command. To add a user to the sudo group, you can use the usermod command:

sudo usermod -aG sudo username

Replace username with the name of the user you want to add to the sudo group.

2. Configure the sudoers file to allow the user to run the sudo command without a password:

The sudoers file is a configuration file that controls which users are allowed to run the sudo command and how they are allowed to use it. To allow a user to run the sudo command without a password, you can edit the sudoers file and add the following line:

username ALL=(ALL) NOPASSWD: ALL

Replace username with the name of the user you want to allow to run the sudo command without a password.

You can edit the sudoers file with the visudo command, which is a special editor for the sudoers file that checks the syntax of the file before saving it.

To edit the sudoers file with visudo, you can use the following command:

sudo visudo

This will open the sudoers file in the visudo editor.

3. Save the sudoers file and exit the editor.

Now, the user you specified should be able to run the sudo command without a password.

Keep in mind that allowing a user to run the sudo command without a password can be a security risk, as it allows the user to execute commands with root privileges without authentication. You should use this feature with caution and only allow it for trusted users.