Change file attributes

Linux chattr command syntax

Function: chattr command is used to change file attributes.

Syntax: chattr [-RV][-v<version number>][ /-/=<properties>][file or directory...]

Linux chattr command example

Use the chattr command to prevent a key file in the system from being modified: 

chattr +i /etc/resolv.conf
lsattr /etc/resolv.conf

will display the following attributes 

----i-------- /etc/resolv.conf

Allow a file to only append data to it, but not delete it, applicable to various log files: 

chattr +a /var/log/messages