Add useful apt aliases to handle obsolete packages

.zsh/config/50_debian.zsh

@@ -17,6 +17,9 @@ alias agi="sudo apt-get install"
 alias au="sudo apt-get update"
 alias aug="sudo apt-get update && sudo apt-get upgrade"
 alias dbuild="time debuild -eDEB_BUILD_OPTIONS='parallel=9' -i -us -uc --lintian-opts --color=always -IE --pedantic"
+alias apt-show-obsolete="aptitude search '?obsolete'"
+alias apt-purge-obsolete="apt-get --purge remove $(aptitude search '?obsolete' -F '%p' | xargs)"
+
 
 # fix some zpresto aliases
 unalias debi