更換yum源，yum下載rpm包

更換yum倉庫（國內源）

• cd /etc/yum.repos.d/

• rm -f dvd.repo

• wget http://mirrors.163.com/.help/CentOS7-Base-163.repo

• 或者 curl -O http://mirrors.163.com/.help/CentOS7-Base-163.repo

• yum list

---

操做

[root@localhost ~]# ls /etc/yum.repos.d/
CentOS-Base.repo  CentOS-CR.repo  CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentOS-Media.repo  CentOS-Sources.repo  CentOS-Vault.repo

▶ wget 下載yum源
[root@localhost ~]# wget http://mirrors.163.com/.help/CentOS7-Base-163.repo 
-bash: wget: 未找到命令
▶ 安裝wget命令
[root@localhost ~]# yum install -y wget
已加載插件：fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.btte.net
 * extras: mirrors.neusoft.edu.cn
 * updates: mirrors.aliyun.com
正在解決依賴關係
--> 正在檢查事務

[root@localhost yum.repos.d]# ls       ▶查看已經生成一個163的源          
` CentOS7-Base-163.repo` CentOS-Base.repo  CentOS-CR.repo  CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentOS-Media.repo  CentOS-Sources.repo  CentOS-Vault.repo
[root@localhost yum.repos.d]#

yum list ▶查看

yum clean all▶清除緩存

安裝擴展源 epel

• yum install -y epel-release ▶安裝擴展源

▶會生成這兩個擴展源

CentOS7-Base-163.repo  CentOS-CR.repo         CentOS-fasttrack.repo  CentOS-Sources.repo  epel.repo
CentOS-Base.repo       CentOS-Debuginfo.repo  CentOS-Media.repo      CentOS-Vault.repo    epel-testing.repo
[root@localhost yum.repos.d]#

• yum list |grep epel ▶列出包名過濾出擴展源

yum 下載 rpm 包

• yum install -y 包名 --downloadonly ▶僅僅下載不安裝
• ls /var/cache/yum/x86_64/7/ ▶被下載到這個地方
• yum install -y 包名 --downloadonly --downloaddir=路徑 ▶指定下載到哪裏
• yum reinstall -y 包名 --downloadonly --downloaddir=路徑 ▶從新安裝指定下載