1.1在安装服务之前，我们首先对我们的实验环境进行一些配置
1.1.1清空关闭防火墙
[root@localhost ~]# iptables -F #请购iptables的规则
[root@localhost ~]# systemctl stop firewalld #关闭防火墙
[root@localhost ~]# systemctl disable firewalld #关闭防火墙开机自启动
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
1.1.2关闭selinux
[root@localhost ~]# getenforce #查看selinux的状态
Enforcing
[root@localhost ~]# vim /etc/selinux/config #打开selinux的配置文件
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled #此项设置为disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
1.1.3 配置好静态IP
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-enp0s3 #编辑网络配置文件
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=enp0s3
UUID=79d2c568-f2ba-4cbc-a9c7-28263b697660
DEVICE=enp0s3
ONBOOT=yes
IPADDR=192.168.135.8
GATEWAY=192.168.135.2
NETMASK=255.255.255.0
DNS1=61.128.128.68
1.1.4 配置主机和IP映射关系
[root@localhost ~]# vim /etc/host
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.135.8 test.cn test
1.1.5 修改主机名
[root@localhost ~]# vim /etc/hostname #打开主机名配置文件
test
[root@localhost ~]# hostname test #立即生效
1.1.6 配置好yum源
1）配置本地yum源
[root@test ~]# mount /dev/sr0 /mnt/ #将镜像文件挂载到mnt下
mount: /dev/sr0 写保护，将以只读方式挂载
[root@test ~]# echo "/dev/sro /mnt iso9660 defaults 0 0 " >>/etc/fstab #写入挂载配置文件中，让镜像开机自动挂载
[root@test ~]# rm -rf /etc/yum.repos.d/* #删除系统原自带的所有yum源
[root@test ~]# cat>/etc/yum.repos.d/Centos7.repo<<EOF #新建一个Centos7名字的yum源配置文件
> [Centos7]
> name=Centos7
> baseurl=file:///mnt
> enabled=1
> gpgcheck=0
> EOF
2）配置网络yum源
阿里云镜像源站点（http://mirrors.aliyun.com/）。
centos镜像参考：http://mirrors.aliyun.com/help/centos
CentOS
1、备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
2、下载新的CentOS-Base.repo 到/etc/yum.repos.d/
CentOS 7
wget -O /etc/yum.repos.d/CentOS-Base.repohttp://mirrors.aliyun.com/repo/Centos-7.repo
3）清楚原来yum缓存，并生成新的缓存
[root@test ~]# yum clean all
已加载插件：fastestmirror
正在清理软件源： Centos7
Cleaning up list of fastest mirrors
Other repos take up 79 M of disk space (use --verbose for details)
[root@test ~]# yum makecache
4）安装epel源
[root@test ~]# yum -y install epel-release