Read only root

Archaic archaic at
Sun Jul 18 17:53:17 PDT 2004

On Mon, Jul 19, 2004 at 12:27:05AM +0100, Ian Molton wrote:
> Hi.
> Am planning to do a read only root fs. Anyone got experience of this?

Read my hint. A glibc re-compile will be necessary if you want a
writable mtab. Also, if you are on a 2.6 kernel, you'll have to modify
the setup for udev. Please pass any notes you make on to me so I can
update the hint accordingly.

BTW, I will be updating it eventually for some tips I've picked up along
the way. I don't have my notes handy, but do a grep -r \.pwd\.lock * and
one file will turn up where you can change the lock file location. I
think my hint will put it in /var/lock as that seems logical.

Also, I've not played around with moving all the passwd type files, yet.
You might get away with just symlinks, but I think patching shadow (and
glibc?) would be best.  Though you will still probably need a link to
/etc for compatibility with other packages. If you are using PAM,
though, you can likely patch PAM for the non-standard location and that
will at least fix all the packages that use PAM.


Under democracy one party always devotes its chief energies to trying to
prove that the other party is unfit to rule--and both commonly succeed,
and are right... The United States has never developed an aristocracy
really disinterested or an intelligentsia really intelligent. Its
history is simply a record of vacillations between two gangs of frauds.

- H. L. Mencken

More information about the lfs-chat mailing list