How to make File Undeletable even by root user in Linux

How to make File Undeletable even by root user in Linux

Date: 30-01-2021

1. You can set attribute of a file by using below command.
   # chattr +i directory/file
   Use the below command to view attributes of a file.
   # lsattr directory/file
2. You can remove the attribute of a file.
   # chattr -i directory/file