I think I never published this little shell functions very useful to have in your profile on any Debian system.

# View changelog
function vchl
{
       for i in changelog.gz ChangeLog.gz CHANGELOG.gz ChangeLog changelog CHANGELOG
               do test -f /usr/share/doc/$1/$i && zless /usr/share/doc/$1/$i && break
       done
}
# View Debian changelog
function vdchl
{
       zless /usr/share/doc/$1/changelog.Debian.gz
}