启动MYSQL时发现报错 Starting MySQL. ERROR! Manager of pid-file quit without updating file
尝试方法一：
打开/etc/selinux/config，把SELINUX=enforcing改为SELINUX=disabled后存盘退出重启机器试试
尝试方法二：
确实一般都是配置文件的问题
/etc/来自以下文件：
如果你的内存≤64M，则复制/usr/local/share/mysql/为/etc/
# This is for a system with little memory (<= 64M) where MySQL is only used
# from time to time and it's important that the mysqld daemon
# doesn't use much resources.
如果内存是128M，则复制/usr/local/share/mysql/为/etc/
# This is for a system with little memory (32M - 64M) where MySQL plays
# an important part, or systems up to 128M where MySQL is used together with
# other programs (such as a web server)
如果内存是512M，则复制/usr/local/share/mysql/为/etc/
# This is for a large system with memory = 512M where the system runs mainly
# MySQL.
如果内存是1-2G，则复制/usr/local/share/mysql/为/etc/
# This is for a large system with memory of 1G-2G where the system runs mainly
# MySQL.
