安装 mysql 时出现以下错误
我执行的步骤：从此处下载 apt 文件http://dev.mysql.com/downloads/repo/apt/ 运行此命令
sudo dpkg -i path
因为没有选择 5.5 的选项，所以我选择了 5.6
sudo apt-get update
sudo apt-get install mysql-server
但它给出了错误
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
mysql-server : Depends: mysql-server-5.5 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
/etc/apt/sources.list：http://pastebin.com/PwJX2pi6
/etc/apt/sources.list.d：
kubuntu-ci-stable-trusty.list
kubuntu-ci-stable-trusty.list.save
pwntools-binutils-trusty.list
pwntools-binutils-trusty.list.save
rvm-smplayer-trusty.list
webupd8team-java-trusty.list
webupd8team-java-trusty.list.save