lnmp强行修改mysql root密码的方法

Lnmp安装一段时间后，MYSQL很少用到root账号，久而久之，密码都忘记了，按印象来输入总是提示Mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost' 于是在网上找了下，试了几个方法，问题依旧没能解决。不知道是不是缓存的原因还是怎样，mysql进程是关掉重启过，系统没重新启。

最直接的方法下载官方的修改脚本

执行如下命令：wget http://soft.vpser.net/lnmp/ext/reset_mysql_root_password.sh;sh reset_mysql_root_password.sh

按提示操作，有提示修改成功，但是却登陆不了。

脚本代码如下：#!/bin/bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH

# Check if user is root
if [ $(id -u) != "0" ]; then
    printf "Error: You must be root to run this script!\n"
    exit 1
fi

echo "=========================================================================\n"
printf "Reset MySQL root Password for LNMP  ,  Written by Licess \n"
printf "=========================================================================\n"
printf "LNMP is a tool to auto-compile & install Nginx+MySQL+PHP on Linux \n"
printf "This script is a tool to reset mysql root password for lnmp \n"
printf "For more information please visit http://www.lnmp.org \n"
printf "\n"
printf "Usage: sh reset_mysql_root_password.sh\n"
printf "=========================================================================\n"

mysql_root_password=""
read -p "(Please input New MySQL root password):" mysql_root_password
if [ "$mysql_root_password" = "" ]; then
    echo "Error: Password can't be NULL!!\n"
    exit 1
fi

printf "Stoping MySQL...\n"
/etc/init.d/mysql stop
printf "Starting MySQL with skip grant tables\n"
/usr/local/mysql/bin/mysqld_safe --skip-grant-tables >/dev/null 2>&1 &
printf "using mysql to flush privileges and reset password\n"
sleep 10
printf "update user set password = Password('$mysql_root_password') where User = 'root'\n"
/usr/local/mysql/bin/mysql -u root mysql << EOF
update user set password = Password('$mysql_root_password') where User = 'root';
EOF

reset_status=`echo $?`
if [ $reset_status = "0" ]; then
printf "Password reset succesfully. Now killing mysqld softly\n"
killall mysqld
sleep 10
printf "Restarting the actual mysql service\n"
/etc/init.d/mysql start
printf "Password successfully reset to '$mysql_root_password'\n"
else
printf "Reset MySQL root password failed!\n"
fi

第二种，也是成功的方法如下：

/etc/init.d/mysql stop   (service mysqld stop ) 先关掉mysql
/usr/bin/mysqld_safe --skip-grant-tables
另外开个SSH连接
[root@localhost ~]# mysql
mysql>use mysql
mysql>update user set password=password("123456") where user="root";
mysql>flush privileges;
mysql>exit

pkill -KILL -t pts/0 可将pts为0的**用户(之前运行mysqld_safe的用户窗口)强制踢出
正常启动 MySQL：/etc/init.d/mysql start   (service mysqld start)