升级总出现问题，帮我看一下呗，谢谢了！
各位前辈，帮我看看呗，升级总连不上网似的，不知道怎么回事，弄了半天也不知道到底升上没有 :? 6 not upgraded是不是有6个没有升级呀？有什么办法吗？Could not connect to cuit.lcuc.org:80 (210.41.224.194), connection timed out
Err http://cuit.lcuc.org magiclinux/updates srclist
Could not connect to cuit.lcuc.org:80 (210.41.224.194), connection timed out
Err http://apt.magiclinux.org magiclinux/updates pkglist
Connection failed
Err http://apt.magiclinux.org magiclinux/updates release
Connection failed
Err http://apt.magiclinux.org magiclinux/os srclist
Connection failed
Err http://apt.magiclinux.org magiclinux/updates srclist
Connection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/releaseConnection failed
Failed to fetch http://cuit.lcuc.org/magiclinux/base/releaseCould not connect to cuit.lcuc.org:80 ( 210.41.224.194), connection timed out
Failed to fetch http://apt.magiclinux.org/magiclinux/base/pkglist.osConnection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/release.osConnection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/pkglist.updatesConnection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/release.updatesConnection failed
Failed to fetch http://cuit.lcuc.org/magiclinux/base/pkglist.osCould not connect to cuit.lcuc.org:8 0 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/release.osCould not connect to cuit.lcuc.org:8 0 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/pkglist.updatesCould not connect to cuit.lcuc. org:80 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/release.updatesCould not connect to cuit.lcuc. org:80 (210.41.224.194), connection timed out
Failed to fetch http://apt.magiclinux.org/magiclinux/base/srclist.osConnection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/srclist.updatesConnection failed
Failed to fetch http://cuit.lcuc.org/magiclinux/base/srclist.osCould not connect to cuit.lcuc.org:8 0 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/srclist.updatesCould not connect to cuit.lcuc. org:80 (210.41.224.194), connection timed out
Reading Package Lists... Done
Building Dependency Tree... Done
W: Release files for some repositories could not be retrieved or authenticated. Such repositories are being ignored.
W: You may want to run apt-get update to correct these problems
E: Some index files failed to download, they have been ignored, or old ones used instead.
$ sudo apt-get upgrade
Password:
Reading Package Lists... Done
Building Dependency Tree... Done
The following packages have been kept back
amarok kdeaddons kdenetwork kdenetwork-devel kdeutils tclx
0 upgraded, 0 newly installed, 0 removed and 6 not upgraded.
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