我正在尝试使用“sudo-apt-get update”更新我的 ubuntu，下面是我收到的错误。请帮我解决。
$ sudo apt-get update
Err http://security.ubuntu.com precise-security Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Err http://ppa.launchpad.net precise Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Err http://ubuntu.mirror.ac.ke precise Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Err http://ubuntu.mirror.ac.ke precise-security Release.gpg
Unable to connect to 172.16.63.15:3128:
Err http://ubuntu.mirror.ac.ke precise-updates Release.gpg
Unable to connect to 172.16.63.15:3128:
Err http://extras.ubuntu.com precise Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Err http://archive.canonical.com precise Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Err http://apt.insynchq.com raring Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Err http://dl.google.com stable Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Err http://toolbelt.heroku.com ./ Release.gpg
Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
Reading package lists... Done
W: Failed to fetch http://ubuntu.mirror.ac.ke/ubuntu/dists/precise/Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Failed to fetch http://archive.canonical.com/dists/precise/Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Failed to fetch http://apt.insynchq.com/ubuntu/dists/raring/Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Failed to fetch http://ubuntu.mirror.ac.ke/ubuntu/dists/precise-security/Release.gpg Unable to connect to 172.16.63.15:3128:
W: Failed to fetch http://ubuntu.mirror.ac.ke/ubuntu/dists/precise-updates/Release.gpg Unable to connect to 172.16.63.15:3128:
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Failed to fetch http://toolbelt.heroku.com/ubuntu/./Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Failed to fetch http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu/dists/precise/Release.gpg Could not connect to 172.16.63.15:3128 (172.16.63.15), connection timed out
W: Some index files failed to download. They have been ignored, or old ones used instead.
W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main amd64 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-i386_Packages)
答案1
无法访问您的代理服务器 (172.16.63.15:3128)。请检查其设置是否正确或尝试直接连接。
答案2
服务器security.ubuntu.com现在没有响应。请尝试其他服务器。
进入系统设置，点击软件和更新。在第一个选项卡上，找到标有下载自的下拉菜单，然后选择另一个下载位置或主服务器。
我以前就是这样解决的。