前言

如何安裝別人分享的Centos 7
上面這篇文章詳細講述了，用別人分享的虛擬機的好處，這里我們繼續講解這個虛擬機的好處，有完善能用的軟件源，這個非常的重要。自己網上找，就需要不斷的試錯，而且還不容易找到可以使用的軟件源，這里我們Copy別人分享的Centos 7的軟件源。

ping 測試網絡

一直閃爍，說明網絡配置有問題，可能沒有連接到虛擬網卡

排查原因

排查虛擬機的虛擬網絡是否開啟

如果沒有已啟用，就右鍵啟用

檢查net8虛擬網絡和Centos 7的ip地址是否在一個局域網

點擊虛擬網絡編輯器

點擊更改設置

記錄net8的虛擬網絡地址

192.168.230.0

ip a

查看Centos 7的ip地址是否有

記錄Centos 7的ip地址

192.168.127.126

比較net8和Centos 7的ip地址是否在一個網段

明顯不在一個網段

解決問題

問題

net8和Centos 7的ip地址不在一個網段

解決辦法

修改net8的ip地址，讓其作為Centos 7的網管

讓net8的DHCP重新分配一個子ip

ens33 網卡名字

dhclient ens33

根據自己的實際情況改寫dhclient后面的網卡名字

MobaXterm連接

選擇保存密碼，省的輸的麻煩

密碼最少7位

勾選跟隨目錄

進入yum軟件源配置文件夾

 cd /etc/yum.repos.d/

推薦第一個，具體根據個人選擇

查看需要的軟件源 CentOS-Base.repo

下載到本地

點擊OK

本地查看軟件源

明顯可以看出是阿里的源，總體還是不錯的

CentOS-Base.repo

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#released updates 
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7