GNU/Linux Command – CHATTR

chattr — Change File Attributes on a Ext2 File System.


Ext2 File System(FS) is providing few extra bit to set some special attribute to each file in the FS. ‘chattr’ command is used to changes the file’s special attributes on a Ext2 FS.

$ chattr +A myFile -- Don't change the Access time of this file. $ chattr -V +A myFile -- Same as above. But show verbose output. $ chattr +c myFile -- Save the file in compressed mode. # chattr +i myFile -- Make the file as Read-Only. $ chattr +s myFile -- Mark the file as secrete. During deletionits blocks are Zeroed. $ chattr +u myFile -- Mark for undeletion. If this file is deleted,user can ask for undelete. $ chattr +S myFile -- The changes in the file are written synchronously on the disk. # chattr -i myFile -- Remove the Read-Only Mark. $ chattr =Ac myFile -- Set only A & c bit. Clear all other bits.
Read: man chattr

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