mysqladmin 工具的使用格式：mysqladmin [option] command [command option] command ......option 选项：-c number 自动运行次
mysqladmin 工具的使用格式：
mysqladmin [option] command [command option] command ......
option 选项：
-c number 自动运行次数统计，必须和 -i 一起使用
-i number 间隔多长时间重复执行
每个两秒查看一次服务器的状态，总共重复5次。
./mysqladmin -uroot -p -i 2 -c 5 status
-#, --debug[=name] Output debug log. Often this is 'd:t:o,filename'.
-f, --force Don't ask for confirmation on drop database; with
multiple commands, continue even if an error occurs. 禁用错误，drop 数据库时不提示，执行多条命令时出错继续执行
-C, --compress Use compression in server/client protocol.
--character-sets-dir=name 字符集所在目录
Directory where character sets are.
--default-character-set=name 设置默认字符集
Set the default character set.
-?, --help Display this help and exit. 显示帮助
-h, --host=name Connect to host. 连接的主机名或iP
-p, --password[=name] 登录密码，如果不写于参数后，则会提示输入
Password to use when connecting to server. If password is
not given it's asked from the tty.
-P, --port=# Port number to use for connection. 指定数据库端口
--protocol=name The protocol of connection (tcp,socket,pipe,memory). 指定连接协议
-r, --relative Show difference between current and previous values when
used with -i. Currently works only with extended-status. 显示前后变化的值，必须结合- i
./mysqladmin -uroot -p -i 2 -r extended-status
假如此处显示的uptime 将永远是2，，因为与之前取的结果比只相差2.
-O, --set-variable=name
Change the value of a variable. Please note that this
option is deprecated; you can set variables directly with
--variable-name=value.修改变量的值，该选项已经不再使用，请使用--variable-name=value 的方式修改变量值
-s, --silent Silently exit if one can't connect to server.
-S, --socket=name Socket file to use for connection. 指定socket file
-i, --sleep=# Execute commands again and again with a sleep between. 间隔一段时间执行一次
-u, --user=name User for login if not current user.登录数据库用户名
-v, --verbose Write more information. 写更多的信息
-V, --version Output version information and exit. 显示版本
./mysql -uroot -p -V
-E, --vertical Print output vertically. Is similar to --relative, but
prints output vertically.
-w, --wait[=#] Wait and retry if connection is down. 如果连接断开，等待w 指定的时间后重试
--connect_timeout=#
--shutdown_timeout=#
1、查看服务器的状况：status
./mysql -uroot -p status
显示结果：
Uptime: 4883162 Threads: 1 Questions: 86 Slow queries: 0 Opens: 0 Flush tables: 1 Open tables: 18 Queries per second avg: 0.000
2.修改root 密码：
mysqladmin -u root -poldpassword password 'newpassword'
3.检查mysqlserver是否可用：
mysqladmin -uroot -p ping
显示结果：
mysqld is alive
4.查询服务器的版本
mysqladmin -uroot -p version
