#!/bin/bash
#优化yum
mv /etc/yum.repos.d/CentOS-base.repo /etc/yum.repos.d/CentOS-base.repo.backup
curl -o /etc/yum.repos.d/CentOS-base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y wget &>/dev/null
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
#关闭selinux
sed -i.bak 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
#防火墙的关闭
systemctl stop firewalld
systemctl disable firewalld
#同步字符集
localectl set-locale LANG="en_US.UTF-8"
##时间同步
yum install -y ntpdate &>/dev/null
/usr/sbin/ntpdate ntp1.aliyun.com &>/dev/null
yum install vim lrzsz nmap tree dos2unix nc telnet wget lsof ntpdate bash-completion bash-completion-extras net-tools -y &>/dev/null
#优化ssh修改配置文件
sed -i.bak 's@#UseDNS yes@UseDNS no@g;s@^GSSAPIAuthentication yes@GSSAPIAuthentication no@g' /etc/ssh/sshd_config
systemctl restart sshd
