mysqladmin 管理命令详细应用


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

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