Name
chattr
Synopsis
chattr [options] mode files
Description
Modify file attributes. Specific to Linux Second Extended Filesystem. Behaves similarly to symbolic chmod, using +, -, and =. mode is in the form opcode attribute. See also lsattr.
Options
- -R
Modify directories and their contents recursively.
- -V
Print modes of attributes after changing them.
- -v version
Set the file’s version.
Opcodes
- +
Add attribute.
- -
Remove attribute.
- =
Assign attributes (removing unspecified attributes).
Attributes
- A
Don’t update access time on modify.
- a
Append only for writing. Can be set or cleared only by a privileged user.
- c
Compressed.
- d
No dump.
- i
Immutable. Can be set or cleared only by a privileged user.
- s
Secure deletion; the contents are zeroed on deletion.
- u
Undeletable.
- S
Synchronous updates.
Examples
chattr +a myfile
As superuser
Get Linux in a Nutshell, Third Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.