After upgrading the mysql-server to 5.7 and enabling GTIDs, the mysql-backup script started spewing errors.
Recently I wrote about cherry picking upgrades. Sometimes you'll want to do the inverse.
aptitude upgrade updates ubuntu debian
So, doing an apt-get upgrade on a Debian or Ubuntu machine sometimes does more than you want at once.
I always forget how easy it is to upgrade postgresql on Ubuntu (from 9.1 to 9.3 this time). It seems like a pain to have to manually upgrade the cluster, but when it comes down to it, it's self-documenting and quick.
upgrade postgres ubuntu