把以下内容保存为:reset_mysql_passwd.sh
并加上可执行权限:chmod +x reset_mysql_passwd.sh
执行即可:./reset_mysql_passwd.sh
注意:此脚本默认使用为编译的mysql版本服务名位mysql,如果是yum安装的mysql请将 M_Name=”mysql” 改为 M_Name=”mysqld”

#!/bin/bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
# Check if user is root
if [ $(id -u) != "0" ]; then
 echo "Error: You must be root to run this script!"
 exit 1
fi
echo "========================================================================="
echo "Reset MySQL/MariaDB root Password "
echo "========================================================================="
echo "Usage: bash reset_mysql_root_password.sh"
echo "========================================================================="
if [ -s /usr/local/mariadb/bin/mysql ]; then
 M_Name="mariadb"
else
 M_Name="mysql"
fi
mysql_root_password=""
read -p "(Please input New MySQL root password):" mysql_root_password
if [ "$mysql_root_password" = "" ]; then
 echo "Error: Password can't be NULL!!"
 exit 1
fi
echo "Stoping MySQL..."
/etc/init.d/$M_Name stop
echo "Starting MySQL with skip grant tables"
/usr/local/$M_Name/bin/mysqld_safe --skip-grant-tables >/dev/null 2>&1 &
echo "using mysql to flush privileges and reset password"
sleep 5
echo "update user set password = Password('$mysql_root_password') where User = 'root'"
/usr/local/$M_Name/bin/mysql -u root mysql << EOF
update user set password = Password('$mysql_root_password') where User = 'root';
EOF
reset_status=`echo $?`
if [ $reset_status = "0" ]; then
echo "Password reset succesfully. Now killing mysqld softly"
killall mysqld
sleep 5
echo "Restarting the actual mysql service"
/etc/init.d/$M_Name start
echo "Password successfully reset to '$mysql_root_password'"
else
echo "Reset MySQL root password failed!"
fi