= Developer Guide
  [topic]
@link[guide >index#internals]

== Make Root Filesystem Writable

Sometimes it can be useful to make changes directly to the citadel root filesystem to
experiment with changes or to debug a problem.

First $code(citadel.noverity) must be added to the kernel commandline. After booting with
this command line option verify that dm-verity has been disabled with the $code(dmsetup)
command.

  [screen]
  # dmsetup status rootfs
  0 4194304 linear

If the output displays $code(verity) instead of $code(linear) then dm-verity is enabled
and the disk cannot be safely written to.

Next remount the root filesystem with read-write flag.

  [screen]
  # mount -oremount,rw,noatime /

== Debugging GNOME startup