Lnmp mysql启动错误解决办法：
提示错误
ERROR! MySQL manager or server PID file could not be found!Starting MySQL. ERROR! Manager of pid-file quit without updating file.
网上非常多说法，大家也可以去搜索，也可以参考一下我的，不管是什么错误，大家一定要查看日志才能快速找到办法去修复
一般情况下，lnmp默认的错误日志是在/usr/local/mysql/var下面，yourhost.err （yourhost即你vps的服务器名称）
大家先看看日志more yourhost.err看看是因为什么原因报错的
151216 07:20:16 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var
151216 7:20:16 [ERROR] You need to use --log-bin to make --binlog-format work.
151216 7:20:16 [ERROR] Aborting151216 7:20:16 [Note] /usr/local/mysql/libexec/mysqld: Shutdown complete
151216 07:20:16 mysqld_safe mysqld from pid file /usr/local/mysql/var/yourhost.pid ended
从日志可以看出[ERROR] You need to use --log-bin to make --binlog-format work.
然后查看了一下/etc/my.cnf 发现关闭mysql的日志，而binlog_format=mixed没有注释的缘故
#log-bin=mysql-bin
binlog_format=mixed
那么把binlog_format=mixed修改为#binlog_format=mixed，然后重启mysql， /etc/init.d/mysql start
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