如何在 Ubuntu 14.04 中为 Python 2.7 安装 Jupyter？
我试过：
sudo add-apt-repository ppa:jolicloud-team/ppa
sudo apt-get update
更新输出：
Ign file: InRelease
Get:1 file: Release.gpg [181 B]
Get:2 file: Release [196 B]
Ign file: Translation-en_US
Ign file: Translation-en
Hit http://storage.googleapis.com stable InRelease
Ign http://us.archive.ubuntu.com trusty/universe Translation-en_US
Fetched 5,905 kB in 6s (915 kB/s)
W: Failed to fetch http://ppa.launchpad.net/jolicloud-team/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/jolicloud-team/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones …