Não há problema com o script ou o comando. Mas para sua confirmação eu estou dando meu log aqui
frank-Jai% wget https://anki.googlecode.com/files/anki-2.0.12.deb
--2013-08-02 19:09:12-- https://anki.googlecode.com/files/anki-2.0.12.deb
Resolving anki.googlecode.com (anki.googlecode.com)... 74.125.135.82, 2404:6800:4001:c01::52
Connecting to anki.googlecode.com (anki.googlecode.com)|74.125.135.82|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2958570 (2.8M) [application/x-debian-package]
Saving to: ‘anki-2.0.12.deb’
100%[======================================>] 29,58,570 52.0KB/s in 53s
2013-08-02 19:10:07 (54.1 KB/s) - ‘anki-2.0.12.deb’ saved [2958570/2958570]
Eu fiz a mesma coisa escrevendo um script como você está tentando fazer. aqui está o log,
frank-Jai% cat install.sh
#!/bin/zsh
wget https://anki.googlecode.com/files/anki-2.0.12.deb
done
saída:
frank-Jai% chmod +x install.sh
frank-Jai% ./install.sh
--2013-08-02 19:15:08-- https://anki.googlecode.com/files/anki-2.0.12.deb
Resolving anki.googlecode.com (anki.googlecode.com)... 74.125.135.82, 2404:6800:4001:c01::52
Connecting to anki.googlecode.com (anki.googlecode.com)|74.125.135.82|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2958570 (2.8M) [application/x-debian-package]
Saving to: ‘anki-2.0.12.deb.1’
veja e verifique com o seu script para descobrir onde está o erro.
espero que ajude um pouco.