一键安装MySQL5.7脚本

#!/bin/bash
#
#********************************************************************
#Author:        
#QQ:            
#Date:          
#FileName：      install_mysql5.7_for_centos.sh
#URL:           
#Description：       
#Copyright (C):     
#********************************************************************
#MySQL Download URL: https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-linux-glibc2.12-x86_64.tar.gz

. /etc/init.d/functions 
SRC_DIR=`pwd`
MYSQL='mysql-5.7.29-linux-glibc2.12-x86_64.tar.gz'
COLOR="echo -e \\033[01;31m"
END='\033[0m'
MYSQL_ROOT_PASSWORD=magedu

check (){
cd  $SRC_DIR
if [ !  -e $MYSQL ];then
        $COLOR"缺少${MYSQL}文件"$END
        $COLOR"请将相关软件放在${SRC_DIR}目录下"$END
        exit
elif [ -e /usr/local/mysql ];then
        action "数据库已存在，安装失败" false
        exit
else
    return
fi
} 

install_mysql(){
    $COLOR"开始安装MySQL数据库..."$END
     yum  -y -q install libaio numactl-libs   libaio &> /dev/null
    cd $SRC_DIR
    tar xf $MYSQL -C /usr/l