01-CentOS7M安装配置

内存2GB，CPU1核，硬盘80GB，CentOS7.8

1. 安装过程语言选择：English-English(United States)
2. Network打开
3. time选择Shanghai并打开Network Time
4. Language选择English-English(United States)
5. Software Selection选择Minimal Install
6. Installation destination，configuare partition，/boot分配512M，swap分配4096M，/分配剩余空间，Accept Changes
7. root密码设置为123456
8. 修改IP地址和主机名

vi /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO="static"
IPADDR=192.168.39.10
NETMASK=255.255.255.0
GATEWAY=192.168.39.2
DNS1=192.168.39.2
systemctl restart network
hostnamectl status
hostnamectl set-hostname centos

9. 关闭防火墙

systemctl status firewalld
systemctl stop firewalld
systemctl disable firewalld

10. 修改hosts文件

vi /etc/hosts
192.168.39.10    centos

11. 挂载阿里yum源

# 安装wget工具
yum -y install wget
# 备份原镜像文件
cd /etc/yum.repos.d/
rename .repo .repo.backup *
# 下载新镜像文件
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
# 修改镜像文件（非阿里云ECS用户）
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
# 清除缓存
yum clean all
# 生成缓存
yum makecache
# 查看所有yum源
yum repolist all
# 更新所有包，软件，系统内核
# yum -y update
# 查看系统内核版本
# uname -r
# 查看系统内所有的内核
# rpm -q kernel
# 删除老旧内核
# yum remove -y xxxxxx

12. 安装常用软件

yum install -y vim net-tools lrzsz unzip

13. 关闭SELinux

sestatus
getenforce
setenforce 0
vi /etc/selinux/config
SELINUX=disabled
reboot