`rm` is definitely one of them, it's just suppressed by the `-f` flag. (examples from Ubuntu) $ touch foo $ chmod -w foo $ rm foo rm: remove wr

`rm` is definitely one of them, it's just suppressed by the `-f` flag. (examples from Ubuntu) $ touch foo $ chmod -w foo $ rm foo rm: remove write-protected regular empty file ‘foo’? There's also the immutable attribute many modern filesystems support, which prevents the file from being modified unless the attribute is removed. $ sudo chattr +i foo $ rm foo rm: remove write-protected regular empty file ‘foo’? y rm: cannot remove ‘foo’: Operation not permitted