Portage mini troubleshooter and link collection
Well, nothing fancy but anyway...
Before installation, problems with the output of emerge -pv foo
Install testing version of whole category: http://forums.gentoo.org/viewtopic.php?t=164275
Lost /var http://forums.gentoo.org/viewtopic.php?t=171015
Lost /var/db http://forums.gentoo.org/viewtopic.php?t=57911
Lost world file /var/lib/portage/world, see FAQ GF16
Upgrade/downgrade madness, see FAQ GF22
There are no masked or unmasked packages to satisfy..., see FAQ GF5
Why does portage want to install package foo, see FAQ GF8
During installation, compilation problems
There are just so many ways an installation can fail...
After installation, post emerge problems
Unmerge or cleaning failures, see FAQ GF19
Logging or capturing of einfo and ewarn messages, see http://forums.gentoo.org/viewtopic.php?t=131795 Will be part of portage 2.1