MySQL一键安装Shell脚本的实现

#!/bin/bash

# 配置mysql yum源
wget https://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm
rpm -ivh mysql57-community-release-el7-7.noarch.rpm

# 更新GPG验证密钥，并安装mysql，如果不更新密钥，安装则会失败
# 如果不更新最后两行可能报以下错误
# Failing package is: mysql-community-client-5.7.38-1.el7.x86_64
# GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
yum install mysql-server -y

# 启动mysql
echo '正在启动MySQL，请稍等......'
systemctl start mysqld.service
if [ $? -ne 0 ];then
   echo 'MySQL启动失败!!!'
   exit
else
   echo 'MySQL启动成功！！！'
   echo '===================================='
fi


# 获取初始密码
initpasswd=`cat /var/log/mysqld.log | grep password | awk '{print $NF}'`
echo "初始密码为：${initpasswd}"

# 用户设置密码
flag=1
while [ $flag -eq 1 ]
do
    read -p "请输入新密码："  newpasswd
    read -p "请确认密码："  secondpasswd
    if [ $newpasswd -eq $secondpasswd ]
    then
    flag=2
    else
    echo "两次密码不一致，请重新输入"
    echo "===================================="
    fi
done

echo "设置的新密码为：${newpasswd}"

mysql --connect-expired-password -uroot -p"${initpasswd}" -e "set global validate_password_policy=0;set global validate_password_length=1;alter user 'root'@'localhost' identified by '${newpasswd}';"

if [ $? -ne 0 ];then
   echo '新密码设置失败!!!'
   exit
else
   echo '===================================='
   echo "新密码设置成功!，新密码为：${newpasswd}"
   echo '===================================='
fi

echo "正在开启远程登录......"
mysql --connect-expired-password -uroot -p"${newpasswd}" -e "update mysql.user set Host = '%' where Host = 'localhost' and User='root';flush privileges;"
if [ $? -ne 0 ];then
   echo '远程登录开启失败!!!'
   exit
else
   echo '===================================='
   echo '远程登录开启成功!'
   echo '===================================='
fi