按照此处的说明进行操作...但是当我这样做时，会出现以下错误。有人对为什么有任何想法吗？这是一个非常简洁的程序，我非常喜欢它并希望让它再次运行。
W: Failed to fetch http://ppa.launchpad.net/pj-assis/ppa/ubuntu/dists/karmic/Release.gpg Could not connect to ppa.launchpad.net:80 (91.189.90.217). - connect (111: Connection refused)
W: Failed to fetch http://ppa.launchpad.net/pj-assis/ppa/ubuntu/dists/karmic/main/i18n/Translation-en.bz2 Unable to connect to ppa.launchpad.net:http:
W: Failed to fetch http://ppa.launchpad.net/pj-assis/ppa/ubuntu/dists/karmic/main/i18n/Translation-en_US.bz2 Unable to connect to ppa.launchpad.net:http:
W: Failed to fetch http://ppa.launchpad.net/dockbar-main/ppa/ubuntu/dists/maverick/Release.gpg Unable to connect to ppa.launchpad.net:http:
W: Failed to fetch http://ppa.launchpad.net/dockbar-main/ppa/ubuntu/dists/maverick/main/i18n/Translation-en.bz2 Unable to connect to ppa.launchpad.net:http:
W: Failed to fetch http://ppa.launchpad.net/dockbar-main/ppa/ubuntu/dists/maverick/main/i18n/Translation-en_US.bz2 Unable to connect to ppa.launchpad.net:http:
W: Failed to fetch http://ppa.launchpad.net/kevin-mehall/pithos-daily/ubuntu/dists/maverick/Release.gpg Unable to connect to ppa.launchpad.net:http:
W: Failed to fetch http://ppa.launchpad.net/kevin-mehall/pithos-daily/ubuntu/dists/maverick/main/i18n/Translation-en.bz2 Unable to connect to ppa.launchpad.net:http:
W: Failed to fetch http://ppa.launchpad.net/kevin-mehall/pithos-daily/ubuntu/dists/maverick/main/i18n/Translation-en_US.bz2 Unable to connect to ppa.launchpad.net:http:
W: Some index files failed to download, they have been ignored, or old ones used instead.
您尝试下载的站点存在技术问题。如果你稍后再试一次，你不应该遇到这种情况。
从Launchpad 状态页面：