store /etc in git or mercurial
The etckeeper program is a tool to let /etc be stored in a git or mercurial
repository. It hooks into APT to automatically commit changes made to /etc
during package upgrades. It uses 'metastore' to track file metadata that
version control systems do not normally support, but that is important for
/etc, such as the permissions of /etc/shadow. It's quite modular and
configurable, while also being simple to use if you understand the basics of
working with version control.
