安装mysql-server-5.5不成功，求助

sky-Hawk where

准备安装mysql-server-5.5，安装过程中要求创建root密码，但创建不成功
装完后无法开启mysqld服务

[FAIL] Starting MySQL database server:mysqld. . . . . . . . . . failed!
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
Errors were encountered while processing:
network-manager
mysql-server-5.5
E: Sub-process /usr/bin/dpkg returned an error code (1)