ubuntu彻底卸载某软件包

falldog

　　以mysql-server为例
　　1.apt-get purge mysql-server
　　清洗是相同的删除，除了包删除
　　2.apt-getautoremove mysql-server
　　移除自动安装的依赖包
　　3.apt-get clean mysql-server
　　清理仓库
　　4.dpkg -l | grep ^rc | awk '{print $2}' | grep ^mysql | xargs dpkg -P
　　清楚残余配置文件
　　

　　

　　

　　

　　

start: Job failed to start
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing mysql-server-5.5 (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on mysql-server-5.5; however:
  Package mysql-server-5.5 is not configured yet.
dpkg: error processing mysql-server (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          Errors were encountered while processing:
mysql-server-5.5
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)




解决方法:
删除mysql前 先删除一下 /var/lib/mysql 还有 /etc/mysql





sudo rm /var/lib/mysql/ -R
sudo rm /etc/mysql/ -R


sudo apt-get autoremove mysql* --purge
sudo apt-get remove apparmor


sudo apt-get install mysql-server mysql-common