#!/usr/bin/bash
list(){
echo "--------------------------------------"
echo "------------性能优化工具箱------------"
echo "------------1.更换YUM源---------------"
echo "------------2.关闭防火墙--------------"
echo "------------3.时间同步----------------"
echo "------------4.创建用户----------------"
echo "------------5.安装软件----------------"
echo "------------6.EXIT--------------------"
}
yuan(){
        rm -rf /etc/yum.repos.d/*
        curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo &>/dev/null
        curl -o /etc/yum.repos.d/epel.repo https://mirrors.aliyun.com/repo/epel-7.repo &>/dev/null
        yum clean all
        yum makecache fast
}
fire(){
        systemctl stop firewalld
        systemctl disable firewalld
        setenforce 0 #临时关闭
        sed -ri s/SELINUX=enforcing/SELINUX=disabled/g /etc/selinux/config  #永久关闭
}
timed(){
        rpm -qa |grep ntpdate
        if [ $? -eq 0 ];then
                ntpdate ntp.aliyun.com
        else
                yum -y install ntpdate &> /dev/null
                ntpdate ntp.aliyun.com
fi
}
user(){
        read -p "请输入你要创建的用户名字:" name
        useradd $name
        userpasswd=`echo $RANDOM`
        echo $userpasswd|passwd --stdin $name &>/dev/null
        if [ $? -eq 0 ];then
                echo "用户名：$name的密码：$userpasswd">>/opt/user.txt
                echo "用户创建成功"
        else
                exit
                fi
anzhuang(){
        yum -y install vim lsof unzip wget &>/dev/null
}
}
while :
do
list
read -p "请输入您的选项：" num
case $num in
1)
        yuan
        sleep 3
;;
2)
        fire
        sleep 3
;;
3)
        timed
        sleep 3
;;
4)
        user
        sleep 3
;;
5)
        anzhuang
        sleep 3
;;
6)
        exit
;;
*)
        echo "请您按要求输入:(12345)"
;;
esac
done