For the comments we have lots of links, such as [se] and [ubuntu.se].

Here is a list of requested redirects, from me and the comments:

[launchpad] goes to https://launchpad.net/ubuntu and shows as Launchpad

[launchpad#bugnum] goes to https://bugs.launchpad.net/bugs/bugnum and shows as Bug #bugnum

[forums] goes to http://ubuntuforums.org/ and sows as Ubuntu Forums

[discourse] goes to http://discourse.ubuntu.com and shows as Ubuntu Discourse

[paste] or [pastebinit] goes to http://paste.ubuntu.com and shows as Ubuntu Pastebin

[install-d] goes to http://ubuntu.com/download/desktop/install-ubuntu-desktop and shows as Install Ubuntu Desktop

[install-s] goes to http://ubuntu.com/download/server/install-ubuntu-server and shows as Install Ubuntu Server

ppa:peterlevi/ppa goes to https://launchpad.net/~peterlevi and shows as ppa:peterlevi/ppa