adsf
—appropriately "Um servidor de arquivos morto inativo" - parece uma ótima solução para isso:
$ gem install adsf
Fetching: adsf-1.2.0.gem (100%)
Successfully installed adsf-1.2.0
Parsing documentation for adsf-1.2.0
Installing ri documentation for adsf-1.2.0
Done installing documentation for adsf after 0 seconds
1 gem installed
$
$ adsf
[2015-12-06 08:24:03] INFO WEBrick 1.3.1
[2015-12-06 08:24:03] INFO ruby 2.1.2 (2014-05-08) [x86_64-linux]
[2015-12-06 08:24:03] INFO WEBrick::HTTPServer#start: pid=811 port=3000