Server set-up: Fixing locale and unknown key issues on VPS / Ubuntu “cloud” images

Here are a couple of problems I’ve seen with newly created instances of virtual servers, and their solutions.


When running apt-get upgrade for the first time, many errors appeared regarding an “unset” locale.

My locale is US/English, so the fix was:

sudo locale-gen en_US en_US.UTF-8
dpkg-reconfigure locales

missing keys:

Errors regarding unknown or missing keys.

[MISSINGKEY] is the string in the error message.

apt-key adv --recv-key --keyserver [MISSINGKEY]