How do I install it?

[Znurre]

Originally Posted by gmz12

doesn't work
the archive is ok

Apparently it isn't, or that error wouldn't arise.
I've had that error on 2 occasions:

- The file was corrupted
- The file was downloaded using torrents and the torrent app was still running, so some of the file handles were not closed properly.

Another possibility that strikes me is that the problem could be due to Ubuntu using dash instead of bash, but in that case I am sure more users would've had problems...