missing manpage for ping
You need to re-emerge iputils with the doc USE flag enabled to get the ping man page, see here for more details: http://forums.gentoo.org/viewtopic-t-570331.html
sys-apps/man-pages never installed manpage for ping. *** This bug has been marked as a duplicate of bug 158660 *** *** This bug has been marked as a duplicate of bug 158660 ***