shell脚本修改mysql密码

不知道你们有没有过这种经历，刚安装的mysql，立马就忘记了密码，或者过了一段时间就忘记了，找回太难了，得翻各种配置。下面 教大家一个脚本，专治mysql密码忘记的功能，一行命令就可以搞定，你一定会喜欢的

#!/bin/bash


# Check if user is root
if [ $(id -u) != "0" ]; then
    echo "must root"
    exit 1
fi

echo "+-------------------------------------------------------------------+"
echo "|   Reset MySQL Root Password"
echo "+-------------------------------------------------------------------+"

if [ -s /usr/local/mysql/bin/mysql ]; then
    DB_Name="mysql"
    DB_Version=`/usr/local/mysql/bin/mysql_config --version`
else
    echo "MySQL not found!"
    exit 1
fi

while :;do
    DB_Root_Password=""
    read -p "Enter New ${DB_Name} root password: " DB_Root_Password
    if [ "${DB_Root_Password}" = "" ]; then
        echo "Error: Password can't be NULL!!"
    else
        break
    fi
done

echo "Stoping ${DB_Name}..."
/etc/init.d/${DB_Name} stop
echo "Starting ${DB_Name} with skip grant tables"
/usr/local/${DB_Name}/bin/mysqld_safe --skip-grant-tables >/dev/null 2>&1 &
sleep 5
echo "update ${DB_Name} root password..."
if echo "${DB_Version}" | grep -Eqi '^8.0.|^5.7.|^10.[234].'; then
    /usr/local/${DB_Name}/bin/mysql -u root << EOF
FLUSH PRIVILEGES;
ALTER USER 'root'@'localhost' IDENTIFIED BY '${DB_Root_Password}';
EOF
else
    /usr/local/${DB_Name}/bin/mysql -u root << EOF
update mysql.user set password = Password('${DB_Root_Password}') where User = 'root';
EOF
fi

if [ $? -eq 0 ]; then
    echo "Password reset succesfully. Now killing mysqld softly"
    if command -v killall >/dev/null 2>&1; then
        killall mysqld
    else
        kill `pidof mysqld`
    fi
    sleep 5
    echo "Restarting the actual ${DB_Name} service"
    /etc/init.d/${DB_Name} start
    echo "Password successfully reset to '${DB_Root_Password}'"
else
    echo "Reset ${DB_Name} root password failed!"
fi

至此结束了, 希望对大家有帮助

lnmp官网有很多脚本，对于脚本的初学者，可以去看看大牛们的shell写法，饮水思源