After a fresh install of http://lubuntu.net 15.04 i386:
$ sudo add-apt-repository ppa:midori
Midori Browser
http://twotoasts.de/index.php/midori/
This PPA is signed. To add the GPG key to your apt keyring:
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com A69241F1
Starting with Karmic, adding the PPA and its key is as simple as:
sudo add-apt-repository ppa:midori
You may also want to use the WebKit-team PPA:
https://launchpad.net/~webkit-team/+archive/ppa
You can find unstable Midori versions at
https://launchpad.net/~midori/+archive/midori-dev
Mais informações: https://launchpad.net/~midori/+archive/ubuntu/ppa
Pressione [ENTER] para continuar ou ctrl-c para cancelar a adição
gpg: chaveiro `/tmp/tmpd8ft4twf/secring.gpg' criado
gpg: chaveiro `/tmp/tmpd8ft4twf/pubring.gpg' criado
gpg: requisitando chave A69241F1 de servidor hkp - keyserver.ubuntu.com
gpg: /tmp/tmpd8ft4twf/trustdb.gpg: banco de dados de confiabilidade criado
gpg: chave A69241F1: chave pública "Launchpad PPA for midori" importada
gpg: ultimamente não encontradas chaves confiáveis
gpg: Número total processado: 1
gpg: importados: 1 (RSA: 1)
OK
$ sudo apt-get update
Ign http://br.archive.ubuntu.com vivid InRelease
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Err http://ppa.launchpad.net vivid/main i386 Packages
404 Not Found
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Baixados 109 kB em 16s (6.764 B/s)
W: Falhou ao buscar http://ppa.launchpad.net/midori/ppa/ubuntu/dists/vivid/main/binary-i386/Packages 404 Not Found
E: Falhou o download de alguns ficheiros de índice. Foram ignorados ou os antigos foram usados em seu lugar.
Midori 0.5.10 on Vivid is only on Webkit-Dev:
https:/