MySQL一鍵安裝Shell指令碼的實現

#!/bin/bash

# 設定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驗證金鑰，並安裝mysql，如果不更新金鑰，安裝則會失敗
# 如果不更新最後兩行可能報以下錯誤
# 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

# 啟動mysql
echo '正在啟動MySQL，請稍等......'
systemctl start mysqld.service
if [ $? -ne 0 ];then
   echo 'MySQL啟動失敗!!!'
   exit
else
   echo 'MySQL啟動成功！！！'
   echo '===================================='
fi


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

# 使用者設定密碼
flag=1
while [ $flag -eq 1 ]
do
    read -p "請輸入新密碼："  newpasswd
    read -p "請確認密碼："  secondpasswd
    if [ $newpasswd -eq $secondpasswd ]
    then
    flag=2
    else
    echo "兩次密碼不一致，請重新輸入"
    echo "===================================="
    fi
done

echo "設定的新密碼為：${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 [ $? -ne 0 ];then
   echo '新密碼設定失敗!!!'
   exit
else
   echo '===================================='
   echo "新密碼設定成功!，新密碼為：${newpasswd}"
   echo '===================================='
fi

echo "正在開啟遠端登入......"
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 '遠端登入開啟失敗!!!'
   exit
else
   echo '===================================='
   echo '遠端登入開啟成功!'
   echo '===================================='
fi