1. 关闭数据库命令：
使用MYSQLADMIN的方式关闭数据库
mysqladmin -uroot -p shutdown
查看关库日志：
140608 21:12:21 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown #正常关闭方式
140608 21:12:21 [Note] Event Scheduler: Purging the queue. 0 events #清除EVENT队列
140608 21:12:23 [Warning] /usr/local/mysql/bin/mysqld: Forcing close of thread 1011 user: 'root' #关闭ROOT用户的连接
140608 21:12:23 InnoDB: Starting shutdown... #开始关闭数据库
140608 21:12:24 InnoDB: Shutdown completed; log sequence number 1613397 #关闭完成，并记录下LSN号
140608 21:12:24 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete #关闭结束
140608 21:12:24 mysqld_safe mysqld from pid file /data/mysql/mysql_3306/data/mysql_source.pid ended #结束MYSQL进程。
2. 打开数据库的命令：
cd /usr/local/mysql/bin/
./mysqld_safe --defaults-file=/etc/my.cnf &
查看数据库输出日志：
140608 21:24:54 mysqld_safe Starting mysqld daemon with databases from /data/mysql/mysql_3306/data #开始启动数据库，从定制的数据文件目录。
140608 21:24:54 InnoDB: Mutexes and rw_locks use GCC atomic builtins #加截MUTEXES AND RW_LOCKS
140608 21:24:54 InnoDB: Compressed tables use zlib 1.2.3
140608 21:24:54 InnoDB: Using Linux native AIO
140608 21:24:54 InnoDB: Initializing buffer pool, size = 128.0M #初始化BUFFER POOL
140608 21:24:54 InnoDB: Completed initialization of buffer pool #完成初始化
140608 21:24:54 InnoDB: highest supported file format is Barracuda.
140608 21:24:54 InnoDB: Waiting for the background threads to start #等待启动后台线程。
140608 21:24:55 InnoDB: 5.5.37 started; log sequence number 1613397 #从这里可以看出和上面关机的LSN是一致的。
140608 21:24:55 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306 #绑定IP地址与端口
140608 21:24:55 [Note] - '0.0.0.0' resolves to '0.0.0.0';
140608 21:24:55 [Note] Server socket created on IP: '0.0.0.0'. #创建SOCKET
140608 21:24:55 [Note] Event Scheduler: Loaded 0 events #加载EVENT。
140608 21:24:55 [Note] /usr/local/mysql/bin/mysqld: ready for connections. #MYSQLD进程等待连接
Version: '5.5.37-log' socket: '/tmp/mysql.sock' port: 3306 Source distribution
3. 导常关库的办法：
kill -9 msyql_pid
这种方法不推荐，并非正常的关机方法， 如果启动是用MYSQLD_SAFE启动的话，KILL是会自动重启的。
[root@mysql_source bin]# kill -9 8844
[root@mysql_source bin]# ./mysqld_safe: line 165: 8844 已杀死 nohup /usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql/ --datadir=/data/mysql/mysql_3306/data --plugin-dir=/usr/local/mysql//lib/plugin --user=mysql --log-error=/data/mysql/mysql_3306/data/error.log --open-files-limit=8192 --pid-file=/data/mysql/mysql_3306/data/mysql_source.pid --socket=/tmp/mysql.sock --port=3306 < /dev/null >> /data/mysql/mysql_3306/data/error.log 2>&1
140608 21:44:09 mysqld_safe Number of processes running now: 0
140608 21:44:09 mysqld_safe mysqld restarted
下面写个小脚本用来重启吧。
#!/bin/sh
MYSQL_BASE=/usr/local/mysql
export PATH=$MYSQL_BASE/bin:/usr/sbin:/usr/bin:/sbin:/bin
export LD_LIBRARY_PATH=$MYSQL_BASE/lib
if [ "$1" = "stop" ] ; then
$MYSQL_BASE/bin/mysqladmin --defaults-file=/etc/my.cnf -uroot -p shutdown
elif [ "$1" = "restart" ]; then
$MYSQL_BASE/bin/mysqladmin --defaults-file=/etc/my.cnf -uroot -p shutdown
$MYSQL_BASE/bin/mysqld_safe --defaults-file=/etc/my.cnf &
elif [ "$1" = "start" ]; then
$MYSQL_BASE/bin/mysqld_safe --defaults-file=/etc/my.cnf &
else
echo "usage: $0 start|stop|restart"
fi
测试脚本：
[root@mysql_source ~]# ./mysql.sh stop
Enter password:
140608 21:49:36 mysqld_safe mysqld from pid file /data/mysql/mysql_3306/data/mysql_source.pid ended
[1]+ Done ./mysqld_safe --defaults-file=/etc/my.cnf (wd: /usr/local/mysql/bin)
(wd now: ~)
[root@mysql_source ~]# ./mysql.sh start
[root@mysql_source ~]# 140608 21:49:46 mysqld_safe Logging to '/data/mysql/mysql_3306/data/error.log'.
140608 21:49:46 mysqld_safe Starting mysqld daemon with databases from /data/mysql/mysql_3306/data
[root@mysql_source ~]#
[root@mysql_source ~]#
[root@mysql_source ~]#
[root@mysql_source ~]# ./mysql.sh restart
Enter password:
140608 21:50:01 mysqld_safe mysqld from pid file /data/mysql/mysql_3306/data/mysql_source.pid ended
[root@mysql_source ~]# 140608 21:50:02 mysqld_safe Logging to '/data/mysql/mysql_3306/data/error.log'.
140608 21:50:02 mysqld_safe Starting mysqld daemon with databases from /data/mysql/mysql_3306/data
