I'm refurbishing an old PC to work as a home server for several stuff. I'm looking for a lightweight distribution to install in it, but with a decent package repository. A small image size will be appreciated, as I have slow bandwidth too.
Since nobody has said it yet: Ubuntu server or Debian. /s
In seriousness, I use both. They're pretty great. Note that if you use Ubuntu server you can get Ubuntu Pro free for up to three devices. This comes with ten years (!) of security patches. Great if you aren't keen on upgrading anytime soon.