Append only attribute for directories

Question

I want to create a directory which is undeletable, and that you can only add files, not delete any file therein.

I was reading the man chattr page and I came across attribute a

A file with the 'a' attribute set can only be opened in append mode for writing. Only the superuser or a process possessing the CAP_LINUX_IMMUTABLE capability can set or clear this attribute.

But it just mentions files. Can I apply it to a directory? Something like

sudo chattr +a +u /path/to/dir

Does this answer your question? What is the effect of "chattr +a" on a directory — muru, Feb 19 '23 at 11:52

score 1 · Accepted Answer · answered Feb 19 '23 at 18:02

1

This works

sudo chattr +a +u /path/to/dir

answered Feb 19 '23 at 18:02

João Pimentel Ferreira

820

Append only attribute for directories

1 Answers1