我使用软件和更新窗口将下载服务器从斯里兰卡服务器更改为美国服务器。然后我尝试使用此命令安装 mysql。
sudo apt-get update
sudo apt-get install mysql-server
它给了我这个错误。
Reading package lists... Done
Building dependency tree
Reading state information... Done
N: Ignoring file 'google-talkplugin.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'google-talkplugin.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
E: Unable to locate package mysql-server
然后我尝试将下载服务器改回斯里兰卡服务器。但该服务器已在服务器位置中消失。当我点击“选择最佳服务器”按钮时，它显示
No suitable download server was found. Please check your internet connection.
我该如何解决这个问题？
答案1
您可以手动编辑 /etc/apt/sources.list 文件。从那里，您可以将所有服务器改回http://mirror.learn.ac.lk/ubuntu。在我的桌面上，这被列为斯里兰卡镜像。您可以使用 gedit、nano、leafpad、vi 或您最喜欢的文本编辑器以 sudo 权限打开该文件。示例：
sudo gedit /etc/apt/sources.list
根据个人用户偏好，该文件应该看起来像这样或大致相似。
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://mirror.learn.ac.lk/ubuntu precise main restricted
#deb-src http://mirror.learn.ac.lk/ubuntu precise main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://mirror.learn.ac.lk/ubuntu precise-updates main restricted
#deb-src http://mirror.learn.ac.lk/ubuntu precise-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://mirror.learn.ac.lk/ubuntu precise universe
#deb-src http://mirror.learn.ac.lk/ubuntu precise universe
deb http://mirror.learn.ac.lk/ubuntu precise-updates universe
#deb-src http://mirror.learn.ac.lk/ubuntu precise-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://mirror.learn.ac.lk/ubuntu precise multiverse
#deb-src http://mirror.learn.ac.lk/ubuntu precise multiverse
deb http://mirror.learn.ac.lk/ubuntu precise-updates multiverse
#deb-src http://mirror.learn.ac.lk/ubuntu precise-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://mirror.learn.ac.lk/ubuntu precise-backports main restricted universe multiverse
#deb-src http://mirror.learn.ac.lk/ubuntu precise-backports main restricted universe multiverse
deb http://mirror.learn.ac.lk/ubuntu precise-security main restricted
#deb-src http://mirror.learn.ac.lk/ubuntu precise-security main restricted
deb http://mirror.learn.ac.lk/ubuntu precise-security universe
#deb-src http://mirror.learn.ac.lk/ubuntu precise-security universe
deb http://mirror.learn.ac.lk/ubuntu precise-security multiverse
#deb-src http://mirror.learn.ac.lk/ubuntu precise-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 precise partner
#deb-src http://archive.canonical.com/ubuntu precise partner
## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## 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 precise main
#deb-src http://extras.ubuntu.com/ubuntu precise main
以下是该列表的精简版，希望对您有所帮助。事实上，您实际上并不需要所有其他内容，只需以下几行，文件就可以发挥相同的功能：
deb http://mirror.learn.ac.lk/ubuntu precise main restricted
deb http://mirror.learn.ac.lk/ubuntu precise-updates main restricted
deb http://mirror.learn.ac.lk/ubuntu precise universe
deb http://mirror.learn.ac.lk/ubuntu precise-updates universe
deb http://mirror.learn.ac.lk/ubuntu precise multiverse
deb http://mirror.learn.ac.lk/ubuntu precise-updates multiverse
deb http://mirror.learn.ac.lk/ubuntu precise-backports main restricted universe multiverse
deb http://mirror.learn.ac.lk/ubuntu precise-security main restricted
deb http://mirror.learn.ac.lk/ubuntu precise-security universe
deb http://mirror.learn.ac.lk/ubuntu precise-security multiverse
deb http://archive.canonical.com/ubuntu precise partner
deb http://extras.ubuntu.com/ubuntu precise main