chattr Linux Commands

What is Linux chattr Command?


chattr COMMAND:

chattr command is used to change the file attributes. This is an admin command. Root user only can change the file attributes/Process.


chattr [options] filename


+i Make the file as Read-Only.
-i Remove the Read-Only.
+a Can't open file for writing.
-a Open file for writing.
+S The changes in the file are written synchronously on the disk.


  1. chattr +i test.txt

    Here the 'test.txt' file has the write permission, to make it as Read-Only file use +i option.
  2. chattr -i test.txt

    The above command process is used to remove the Read-Only mark.

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