openstack-ansible-security/doc/source/developer-notes/V-38447.rst

Exception

Verifying contents of files installed from packages is more difficult in Ubuntu, mainly due to the lack of an equivalent of rpm -V. The debsums package installs the debsums command and that can be used to look for files that have changed since the package was installed.

However, not all packages have MD5 checksums for all files and debsums doesn't do detailed checking like rpm. Deployers are urged to run debsums -c to review changes made to files on their systems. This report takes a long time to run on most systems.