A configuration file may be provided through standard input. Without a configuration file, execute `python main.py`. By default, all the available distributions will be checked. With a configuration file, execute `python main.py < name_of_config_file.in`, for example, `python main.py < example.in`. In this case, only the distributions listed in the configuration file will be checked.
if we can just view their repo online, we only have to remember the link for their repo and then check the latest timestamp in their repo the same way we check ours
even if the date relies on a specific file in their repo, we can still find the right link for it
opensuse: http://download.opensuse.org/ has public repo, a possible timestamp called latest in history, our mirror doesn't have this file tho, no mirror tracker
raspbian: http://archive.raspbian.org/raspbian/ snapshotindex.txt is most likely a timestamp, tho i'm not sure. also i think our mirror is completely outdated, it's not listed on official mirror list
slackware: https://mirrors.slackware.com/mirrorlist/ https://mirrors.slackware.com/slackware/ checking using the last updated date here, don't know if it's entirely accurate
trisquel: https://trisquel.info/mirmon/index.html out of date website!? please recheck this!!!
ubuntu-ports: http://ports.ubuntu.com/ubuntu-ports/ checks the file anonster.canonical.com, which appears to be a timestamp (check it to make sure!!!)
