/usr/share/doc/kde/HTML/en/ksysguard/common is in ksysguard 4:4.8.5-0ubuntu0.4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/kde/HTML/en/ksysguard/../common
/usr/share/doc/kde/HTML/en/ksysguard/../common