centos7系統初始化腳本

  Linux系統最小化安裝完成後，一般須要進行初始化，如下爲centos7系統初始化腳本，待繼續優化ing...

#!/bin/bash
#
#********************************************************************
#Author:        Eddie.Peng
#URL:           https://www.cnblogs.com/eddie1127/
#Date:          2019-09-06
#FileName:      centos7_reset.sh
#Description:   The script for centos7 reset
#********************************************************************

#設置命令提示符顏色
echo 'PS1="\[\e[1;31m\][\u@\h \W]\\$\[\e[0m\]"' >> /etc/profile.d/env.sh
#設置系統默認編輯器爲vim
echo export EDITOR=vim >> /etc/profile.d/env.sh

#檢查腳本運行用戶是否爲root
if [ $(id -u) !=0 ];then
	echo -e "\033[1;31m Error! You must be root to run this script! \033[0m"
	exit 10
fi

#禁用selinux
sed -ri 's/^(SELINUX=)enforcing/\1disabled/'  /etc/selinux/config

#禁用防火牆
systemctl stop firewalld.service
systemctl disable firewalld.service

#優化ssh登陸
sed -ri 's/GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/sshd_config
sed -ri 's/#UseDNS yes/UseDNS no/' /etc/ssh/sshd_config

#修改網卡名稱爲統一爲傳統方式命名
sed -ri '/CMDLINE/s#(.*)"#\1 net.ifnames=0"#' /etc/default/grub
grub2-mkconfig -o /etc/grub2.cfg

#禁用不須要的服務
systemctl stop postfix.service
systemctl disable postfix.service

#安裝wget工具
yum -y install wget

#配置系統使用阿里雲yum源和EPEL源
mkdir /etc/yum.repos.d/bak
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak/
wget -P /etc/yum.repos.d http://mirrors.aliyun.com/repo/Centos-7.repo
wget -P /etc/yum.repos.d http://mirrors.aliyun.com/repo/epel-7.repo
yum make clean all
yum makecache

#安裝bash命令tab自動補全組件
yum -y install bash-completion
#安裝vim編輯器
yum -y install vim screen lrzsz tree psmisc
#安裝壓縮解壓工具
yum -y install zip unzip bzip2 gdisk
#安裝網絡及性能監控工具
yum -y install telnet net-tools sysstat iftop lsof iotop htop dstat
#安裝源碼編譯工具及開發組件
yum -y install cmake gcc gcc-c++ zib zlib-devel open openssl-devel pcre pcre-devel curl

#安裝chrony時間同步服務
yum -y install chrony
systemctl enable chronyd.service
systemctl start chronyd.service

#配置chrony時間同步阿里雲ntp服務器
sed -i -e '/^server/s/^/#/'  -e '1a server ntp.aliyun.com iburst' /etc/chrony.conf
systemctl restart chronyd.service

#初始化完成重啓系統
echo -e "\033[1;32m System initialization is complete and will be reboot in 10s...\033[0m"
sleep 10
reboot