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AAAlfonz: I get this when I try to run the wget:
the download link works fine here as well

you can alternatively try to download it from github:

point your browser here:

direkt link:
AAAlfonz: ...
Resolviendo ( falló: Fallo temporal en la resolución del nombre.
mchack: yep, like muntdefems already said it looks like a dns error. Question is do you write your posts with said ubuntu? then that's weird because I don't think you can use the internet at all without resolving dns queries.
Anyway, just as a try you could try using the google domain name servers like so:

sudo echo "nameserver" > /etc/resolv.conf
Depending on how its configured, Google Chrome may prefer Google's DNS over whatever's set up for the OS.