所以我最近在笔记本电脑上安装的 Ubuntu 14.10 开始出现异常。
但是我发现我的桌面 Ubuntu 14.10 每周至少会获得两次新的更新，但却找不到任何新的更新。
我可以通过更改下载更新的服务器来解决这个问题，但这只适用于一个更新。之后我必须再次执行此操作才能查看新的更新。
我的机器出现这种情况到底出了什么问题？
我的来源列表：
cat /etc/apt/sources.list
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic main restricted
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates main restricted
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic universe
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic universe
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates universe
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic multiverse
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-backports main restricted universe multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-backports main restricted universe multiverse
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security main restricted
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security main restricted
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security universe
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security universe
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu saucy partner
# deb-src http://archive.canonical.com/ubuntu saucy partner
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu utopic main
deb-src http://extras.ubuntu.com/ubuntu utopic main
答案1
你检查过 /etc/apt/sources.list 文件吗？也许你必须更正源列表。