A file with the attribute ‘ d‘, will no more candidate for backup when the dump process is run.A file is set with ‘ t‘ attribute, no tail-merging.A file with the ‘ j‘ attribute is set, all of its information updated to the ext3 journal before being updated to the file itself.Means no renaming, no symbolic link creation, no execution, no writable, only superuser can unset the attribute.

A file is set with ‘ i‘ attribute, cannot be modified (immutable).

A file is set with ‘ a‘ attribute, can only be open in append mode for writing.

If a file is modified with ‘ S‘ attribute set, the changes are updates synchronously on the disk.

If a file is accessed with ‘ A‘ attribute set, its atime record is not updated.

Syntax of chattr # chattr įollowing are the list of common attributes and associated flags can be set/unset using the chattr command. This is very useful to set attributes in system files like passwd and shadow files wherein user’s info are contains.

One cannot delete or modify file/folder once attributes are sets with chattr command, even though one have full permissions on it. supports all the flags, though all the flags won’t support to all non-native FS. Chattr (Change Attribute) is a command line Linux utility that is used to set/unset certain attributes to a file in Linux system to secure accidental deletion or modification of important files and folders, even though you are logged in as a root user.

Attrib not resetting system file