ubuntu 中運行完sudo apt-get install curl之后，最后出現:
ldconfig deferred processing now taking place
Errors were encountered while processing:
mysql-server-5.5
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
需要將原來的mysql數據庫進行重裝，操作之前最好是備份一下目前的數據庫.
刪除 /var/lib/mysql和/etc/mysql兩個文件夾
sudo rm /var/lib/mysql/ -R
sudo rm /etc/mysql/ -R
卸載mysql數據庫和apparmor
sudo apt-get autoremove mysql* --purge
sudo apt-get remove apparmor
重新安裝mysql
sudo apt-get install mysql-server mysql-common