CentOS 初始环境设置

[root@localhost ~]# ip add

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000

    link/ether 00:0c:29:c3:10:68 brd ff:ff:ff:ff:ff:ff

    inet 172.16.101.161/24 brd 172.16.101.255 scope global noprefixroute dynamic ens192

       valid_lft 502sec preferred_lft 502sec

    inet6 fe80::cbb1:520:1836:7a47/64 scope link noprefixroute

       valid_lft forever preferred_lft forever

3: ens224: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000

    link/ether 00:0c:29:c3:10:72 brd ff:ff:ff:ff:ff:ff

内网IP

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens192

TYPE=Ethernet

PROXY_METHOD=none

BROWSER_ONLY=no

BOOTPROTO=static

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

IPV6INIT=yes

IPV6_AUTOCONF=yes

IPV6_DEFROUTE=yes

IPV6_FAILURE_FATAL=no

IPV6_ADDR_GEN_MODE=stable-privacy

NAME=ens192

UUID=a5b518b8-f825-4822-9f2e-0ecbe0458b9a

DEVICE=ens192

ONBOOT=yes

IPADDR=172.16.101.161

NETMASK=255.255.255.0

互联网IP

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens224

TYPE=Ethernet

PROXY_METHOD=none

BROWSER_ONLY=no

BOOTPROTO=dhcp

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

IPV6INIT=yes

IPV6_AUTOCONF=yes

IPV6_DEFROUTE=yes

IPV6_FAILURE_FATAL=no

IPV6_ADDR_GEN_MODE=stable-privacy

NAME=ens224

UUID=9ece899d-99f6-41c0-8dc1-0bcee65cdeec

DEVICE=ens224

ONBOOT=yes

[root@localhost ~]# systemctl restart network

重启network

[root@localhost ~]# ip add

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000

    link/ether 00:0c:29:c3:10:68 brd ff:ff:ff:ff:ff:ff

    inet 172.16.101.161/24 brd 172.16.101.255 scope global noprefixroute ens192

       valid_lft forever preferred_lft forever

    inet6 fe80::cbb1:520:1836:7a47/64 scope link noprefixroute

       valid_lft forever preferred_lft forever

3: ens224: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000

    link/ether 00:0c:29:c3:10:72 brd ff:ff:ff:ff:ff:ff

    inet 192.168.3.137/24 brd 192.168.3.255 scope global noprefixroute dynamic ens224

       valid_lft 28793sec preferred_lft 28793sec

    inet6 fe80::d99a:9cfe:c43:b5f0/64 scope link noprefixroute

       valid_lft forever preferred_lft forever

#!/bin/bash

#function:CentOS7切换yum源

#author:墨染-2022-6-23

if [ $USER != root ];then

echo "当前不是root用户，请切换至root用户再次运行脚本"

exit

fi

ping -c3 -i0.1 -W1 www.baidu.com &> /dev/null

if [ $? != 0 ];then

echo "当前无网络，请保证网络畅通再次运行脚本"

exit

else

echo "当前网络畅通，即将开始运行脚本"

fi

if [ ! -e /opt/default ];then

  mkdir /opt/default

fi

SL=`ls /etc/yum.repos.d | wc -l`

if [ $SL -eq 8 ];then

  cp /etc/yum.repos.d/* /opt/default

fi

#阿里云yum仓库

function aliyun {

  rm -rvf /etc/yum.repos.d/*.repo &>/dev/null

  echo "开始下载阿里云的yum文件" 

  wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

  if [ $? -eq 0 ];then

    echo "yum仓库下载成功"

    echo "正在清理原来的yum文件" && yum clean all

    echo "正在重新搭建yum仓库"  && yum makecache  

    echo "阿里云yum仓库搭建完成，请查看yum文件数量" && yum repolist | tail -5

  fi

}

#华为云yum仓库

function huaweiyun {

  rm -rvf /etc/yum.repos.d/*.repo &>/dev/null

  echo "开始下载华为云的yum文件"

  wget -O /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repo

  if [ $? -eq 0 ];then

    echo "yum 仓库下载成功"

    echo "正在清理原来的yum文件" && yum clean all

    echo "正在重新搭建yum仓库"  && yum makecache  

    echo "华为云yum仓库搭建完成完成，请查看yum文件数量" && yum repolist | tail -5

  fi

}

#网易163yum仓库

function  wangyi163 {

  rm -rvf /etc/yum.repos.d/*.repo &>/dev/null

  rm -rvf /etc/yum.repos.d/*.repo &>/dev/null

  echo "开始下载网易163的yum文件"

  wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo

  if [ $? -eq 0 ];then

    echo "yum 仓库下载成功"

    echo "正在清理原来的yum文件" && yum clean all

    echo "正在重新搭建yum仓库"  && yum makecache 

    echo "网易163yum仓库搭建完成完成，请查看yum文件数量" && yum repolist | tail -5

  fi

}

#本地yum仓库

function localhost {

  rm -rvf /etc/yum.repos.d/*.repo &>/dev/null

  df -h | grep "/dev/sr0" &> /dev/null

  if [ $? != 0 ];then

    echo "请先到虚拟机挂载光盘，再运行脚本"

    exit

  fi

  mkdir /mnt/cdrom

  mount /dev/sr0 /mnt/cdrom

  echo "/dev/sr0  /mnt/cdrom  iso9660 defaults 0 0" >> /etc/fstab

  mount -a

  cat>>/etc/yum.repos.d/localhost_yum.repo << EOF

[local]

name=localhost_yum

baseurl=file:///mnt/cdrom

gpgcheck=0

enable=1

EOF

  echo "yum仓库配置成功"

  echo "正在清理原来的yum文件" && yum clean all 

  echo "正在重新搭建yum仓库"  && yum makecache   &>/dev/null

  echo "本地仓库搭建完成完成，请查看yum文件数量" && yum repolist | tail -5

}

#系统默认源

function default {

  rm -rvf /etc/yum.repos.d/*.repo &>/dev/null

  echo  "开始恢复系统默认源"

  cp /opt/default/*  /etc/yum.repos.d/

  echo "yum仓库恢复成功"

  echo "正在清理原来的yum文件" && yum clean all 

  echo "正在重新搭建yum仓库"  && yum makecache  

  echo "默认yum仓库执行完成，请查看yum文件数量" && yum repolist | tail -5

}

#case语句；判断键盘输入

echo -e "\033[35m该脚本可部署以下yum仓库：\033[0m"

echo -e "\t\033[36m1、aliyun-yum\033[0m"

echo -e "\t\033[36m2、huaweiyun-yum\033[0m"

echo -e "\t\033[36m3、wangyi163-yum\033[0m"

echo -e "\t\033[36m4、default-yum\033[0m"

echo -e "\t\033[36m5、localhost-yum\033[0m"

read -p "请输入您想切换的yum源名称：" XZ

case $XZ in

1|aliyun-yum)

        aliyun

;;

2|huaweiyun-yum)

        huaweiyun

;;

3|wangyi163-yum)

        wangyi163

;;

4|default-yum)

        default

;;

5|localhost-yum)

        localhost

;;

*)

        echo "请您输入正确的yum源(aliyun|huaweiyun|163|localhost|default)"

;;

esac

echo  "您可以安装某个文件测试"

yum -y install gcc

yum -y install glibc

yum -y install gcc-c++

yum -y install make

yum -y install cmake

yum -y install net-tools

yum -y install screen

yum -y install vim

yum -y install lrzsz

yum -y install tree

yum -y install dos2unix

yum -y install lsof

yum -y install tcpdump

yum -y install bash-completion

yum -y install wget

yum -y install ntp

yum -y install setuptool

yum -y install psmisc

yum -y install openssl

yum -y install openssl-devel

yum -y install bind-utils

yum -y install traceroute

yum -y install epel-release

yum -y install bash-completion bash-completion-extras

关闭 networkmanager

systemctl stop NetworkManager

systemctl disable NetworkManager

遇到坑：没关闭之前，更改网卡配置文件，重启网络服务，总是报错。

关闭 selinux

setenforce 0

getenforce  #查看（临时生效）

sed -i '7s/enforcing/disabled/g' /etc/selinux/config    （永久生效）

修改主机名

Removed symlink /etc/systemd/system/network-online.target.wants/NetworkManager-wait-online.service.

[root@localhost ~]# hostnamectl set-hostname CentOSTest

[root@localhost ~]# bash

[root@centostest ~]#

关闭防火墙

systemctl stop firewalld.service        #停止firewall

systemctl disable firewalld.service     #禁止firewall开机启动

修改SSH

vim /etc/ssh/sshd_config

Port 32223          #修改ssh登陆端口

PermitRootLogin no  #禁止root远程ssh登陆，根据实际需求进行配置

加一条命令提示符颜色显示的变量

在 .bashrc最下边添加

export PS1='\e[1;32m\][\e[1m\]\e[3;35m\]\u\e[0;34m\]@\e[1;33m\]\H\e[1;32m\]][\e[1;34m\]\t\e[1;32m\]][$([[ $? != 0 ]] && echo -ne "\e[31mFAIL\e[0m" || echo -ne "\e[34mOK\e[0m")\e[1;32m\]] \e[1m\]\e[3;30m\]\w\e[0m\]\n\$ '