How do I check sudoers syntax?

The answer is actually pretty easy, by using visudo; visudo has a flag that will perform a syntax check on the sudoers file. You can run this after deployment to ensure the syntax is correct. Another cool feature of visudo is you can tell it to check a specified file rather than the /etc/sudoers file.

How do I fix sudoers error syntax?

To fix this syntax error, stop the instance, detach its root volume, attach it to a recovery instance, mount the root volume as a secondary volume, and then revert the changes to the sudoers file.

What is Sudoer file in Linux?

The sudoers file is a file Linux and Unix administrators use to allocate system rights to system users. This allows the administrator to control who does what. Remember, Linux is built with security in mind. When you want to run a command that requires root rights, Linux checks your username against the sudoers file.

How do I make sudo Passwordless?

How to Setup Sudo No Password in Linux

  1. Open the terminal and type the following command to get /etc/sudoers file: $ sudo visudo. Enter the credential i.e. password to get the file:
  2. Scroll down till the end of the /etc/sudoers file and append the mentioned below line: $ wardah ALL=(ALL) NOPASSWD:ALL.

How do you save sudoers file in Linux?

By typing Ctrl+X nano exits and if your file needs change you will be prompted to save the changes in which case to save you should press Y and then enter to save changes in the same file you open. If you are not using any gui and you just want to leave the shell the command is Ctrl+D.

How do I add sudo commands?

Using visudo and the sudoers Group

  1. Use the visudo command to edit the configuration file: sudo visudo.
  2. This will open /etc/sudoers for editing. To add a user and grant full sudo privileges, add the following line: [username] ALL=(ALL:ALL) ALL.
  3. Save and exit the file.