How to delete read only files.

[Balaji Palaniswami]

On Mon, Jan 30, 2017 at 4:19 PM, Ian Lepore <ian at freebsd.org> wrote:

> On Mon, 2017-01-30 at 16:12 -0800, Balaji Palaniswami wrote:
> > Hi,
> >
> > I am trying to delete read only files.
> >
> > # pwd
> > /usr/home/bp/nfsroot/lib
> > # whoami
> > root
> > # ls
> > libc.so.7       libcrypt.so.5   libthr.so.3
> > # ls -ltr
> > total 3264
> > -r--r--r--  1 root  wheel  1460592 Jan 29 12:07 libc.so.7
> > -r--r--r--  1 root  wheel    51640 Jan 29 12:07 libcrypt.so.5
> > -r--r--r--  1 root  wheel   109568 Jan 29 12:08 libthr.so.3
> > # rm -rf libc.so.7
> > rm: libc.so.7: Operation not permitted
> >
> > # chmod 777 libc.so.7
> > chmod: libc.so.7: Operation not permitted
> >
> > Please suggest me some ways to delete these files.
> >
> > Thanks,
> > Balaji
>
> Those libraries typically have the 'schg' flag set on them, as do some
> others in the tree.  If you need to wipe everything under nfsroot, the
> typical incantation is
>
>   rm -rf nfsroot/ ; chflags -R noschg nfsroot/; rm -rf nfsroot/
>
> that deletes everything it can first, then changes the flags on what's
> left, then deletes them too.  (Doing the noschg first requires
> examining/changing 145,000 files.)
>
> -- Ian
>

It wiped off all files under nfsroot. Thank you so much for your quick help.