解决Mysql不能启动的问题-Manager of pid-file quit without updating f[失败]

安装好MYSQL后启动数据库出错
[root@localhost mysql]# service mysqld start
Starting
MySQL..Manager of pid-file quit without updating
f[失败]
在网上查了半天，找到的有两种方法，
1、在 my.cnf 中增加了
[mysqld]
port =
3306
socket = /tmp/mysql.sock
添加下面一行
datadir =
/var/lib/mysql/
和
[safe_mysqld]
err-log =
/var/log/mysqld.log
pid-file =
/var/lib/mysql/localhost.localdomain.pid
重新启动
mysql成功
/usr/local/mysql/var/db1.pid 这个文件名字貌似不能随便指定的
(我指定成了别的是不行的
,这里的db1是你的hostname)
2、修改改selinux的 我改了
重新启动机器就行了，以下是SELINUX配置文件
[root@localhost selinux]# vi config
# This file
controls the state of SELinux on the system.
# SELINUX= can take one of
these three values:
# enforcing - SELinux security policy is
enforced.
# permissive - SELinux prints warnings instead of
enforcing.
# disabled - SELinux is fully
disabled.
#SELINUX=enforcing
SELINUX=disabled
# SELINUXTYPE= type of
policy in use. Possible values are:
# targeted - Only targeted
network daemons are protected.
# strict - Full SELinux
protection.
SELINUXTYPE=targeted
然后重启计算机

但是还是没有成功，看日志
启动后失败
[root@localhost mysql]# /bin/sh /usr/local/mysql/bin/mysqld_safe

081219 22:09:58 mysqld_safe Logging to
'/var/lib/mysql//localhost.localdomain.err'.
081219 22:09:58 mysqld_safe
Starting mysqld daemon with databases from /var/lib/mysql/
081219 22:09:58
mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid
ended
看日志：
[root@localhost mysql]# cat
/var/lib/mysql/localhost.localdomain.err
081219 21:30:38 mysqld_safe Starting
mysqld daemon with databases from /var/lib/mysql

………………………………
………………………………
081219 21:40:21 [Note]
/usr/local/mysql/libexec/mysqld: Shutdown complete

081219 21:40:21
mysqld_safe mysqld from pid file /var/lib/mysql/localhost.localdomain.pid
ended
081219 21:45:55 mysqld_safe Starting mysqld daemon with databases from
/var/lib/mysql
081219 21:45:55 [ERROR] /usr/local/mysql/libexec/mysqld:
unknown option '--skip-federated'
081219 21:45:55 [ERROR] Aborting
看到这一行
/usr/local/mysql/libexec/mysqld: unknown option
'--skip-federated
然后去/etc/my.cnf文件中把skip-federated注释掉后
[root@localhost mysql]# service mysqld start
Starting
MySQL. [确定]
重启成功了，呵呵，以后要多看日志多google，配合使用，不能只用一个那样死板，要灵活运用.这个问题花掉偶3个小时呢！！哎，生命啊！！如果下去掉那个选项不可以就试试上面的两个方法。