Securing a file as read only in Linux.


Scenario: if you want to make a file remain unchanged in Linux, even the root user should not perform any operation on that file. This requirement will be when you have any data in your pen drive or hard disk that should be unchanged.

Solution: To secure your file do the following command syntax

# chattr +i file

When you do this even the root user can’t delete or update the file.

To unlock this

#chattr –i file, only root can set the attributes and then it gain access.

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