Restore (revert) permission

If your distro is RPM based, you can restore ONLY files that installed by rpm packages.

To restore all package permissions:

rpm --setperms -a

To restore all package owner (user/group):

rpm --setugids -a

If -a doesn't run, you can execute a bash loop:

For permissions:

for x in $(rpm -qa); do rpm --setperms $x; done

For owner:

for x in $(rpm -qa); do rpm --setugids $x; done