一般情况下，我们想要进入MySQL命令模式总是需要按如下交互输入密码确认，才能进入命令行模式：
mysql启动报错-server PID file could not be found解决
[email protected]:~>
mysql -u sl -p
Enter password:
[[email protected]
~]# service mysql stop
其实我们完全可以使用expect编写脚本，来通来expect与shell交互通信来实现免密码登录：
MySQL server PID file could not be found! [失败]
[email protected]:~>
cat mysql.sh
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#!/usr/local/bin/expect
解决方案如下：
spawn /usr/local/services/mysql/bin/mysql -u sl -p
expect {
首先查看下与mysql有关的进程
”assword” { send “slr” }
}
[[email protected]
~]# ps aux |grep mysq*
interact
root 2019 0.0 0.1 6228 1392 ? S 09:22 0:00 /bin/sh
/usr/bin/mysqld_safe –datadir=/var/lib/mysql
–pid-file=/var/lib/mysql/yunhe.pid
其实这段脚本的意思就是说“执行/usr/local/services/mysql/bin/mysql -u
sl
-p，等待响应，若匹配assword，则发送sl(即MySQL用户登录密码)，回车，模拟用户手工操作”。
mysql 2115 0.0 2.9 353596 30808 ? Sl 09:22 0:01
/usr/sbin/mysqld –basedir=/usr –datadir=/var/lib/mysql
–plugin-dir=/usr/lib/mysql/plugin –user=mysql
–log-error=/var/lib/mysql/yunhe.err –pid-file=/var/lib/mysql/yunhe.pid
编写完mysql.sh脚本后，赋予执权限，然后就可以通过执行mysql.sh来免密码进入MySQL命令行模式。
500 4258 0.0 1.6 83432 17484 ? S 09:35 0:01 gedit
/usr/share/mysql/my-medium.cnf
[email protected]:~>
chmod +x mysql.sh
root 5555 0.0 0.0 5936 768 pts/0 S+ 10:04 0:00 grep
mysq*
[email protected]:~>
./mysql.sh
spawn /usr/local/services/mysql/bin/mysql -u sl -p
如果看到上面的内容，那说明mysql相关的进程存在，不过资源调度出现了问题（好像卡死），这时用就要把这些卡死的进程都关闭。
Enter password:
[[email protected]
~]# kill 2019
Welcome to the MySQL monitor. Commands end with ; or g.
[[email protected]
~]# kill 20115
Your MySQL connection id is 12912
-bash: kill: (20115) – 没有那个进程
Server version: 5.5.14-log MySQL Community Server (GPL)
[[email protected]
~]# kill 2115
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights
reserved.
www.2cto.com
Oracle is a registered trademark of Oracle Corporation and/or its
然后重新启动mysql
affiliates. Other names may be trademarks of their respective
[[email protected]
~]# service mysql start
owners.
Starting MySQL… [确定]
Type ‘help;’ or ‘h’ for help. Type ‘c’ to clear the current input
statement.
[[email protected]
~]# mysql -u root -p
mysql>
Enter password:
注：expect拥有众多的参数及丰富的应用场景，有兴趣的同学请自行查看man手册或其它资料。
Welcome to the MySQL monitor. Commands end with ; or \g.
http://www.bkjia.com/Mysql/434586.htmlwww.bkjia.comtruehttp://www.bkjia.com/Mysql/434586.htmlTechArticle一般情况下，我们想要进入MySQL命令模式总是需要按如下交互输入密码确认，才能进入命令行模式：
[email protected]:~
mysql -u sl -p Enter p…
Your MySQL connection id is 1
Server version: 5.6.4-m7 MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights
reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input
statement.
mysql>
http://www.bkjia.com/Mysql/488181.htmlwww.bkjia.comtruehttp://www.bkjia.com/Mysql/488181.htmlTechArticlemysql启动报错-server PID file could not be
found解决
[[email protected]
~]# service mysql stop MySQL server PID file could not be found!
[失败] www.2cto.com 解决方案如下： 首…