How to backup the file?

To back up the /etc/passwd file, you can use the cp command in the terminal. Here’s how to do it:

1. Open a terminal.

2. Use the following command to create a backup of the /etc/passwd file:

   sudo cp /etc/passwd /etc/passwd.bak

This command copies the /etc/passwd file and creates a backup named passwd.bak in the same directory.

Verify the Backup

To verify that the backup was created successfully, you can list the files in the /etc directory:

ls -l /etc/passwd.bak

Restore the Backup

If you need to restore the original file from the backup, you can use the following command:

sudo cp /etc/passwd.bak /etc/passwd

Make sure to handle the /etc/passwd file with care, as it is critical for user account management on the system.