[root@hear yum.repos.d]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
No packages marked for update
[root@hear yum.repos.d]# ls
CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo mysql-community.repo
CentOS-CR.repo CentOS-fasttrack.repo CentOS-Sources.repo epel.repo mysql-community-source.repo
修改yum源，在安裝更新rpm包時獲得比較理想的速度。國內比較快的有163源、sohu源。這里以163源為例子。
cd /etc/yum.repos.d mv CentOS-Base.repo CentOS-Base.repo.backup wget http://mirrors.163.com/.help/CentOS6-Base-163.repo mv CentOS6-Base-163.repo CentOS-Base.repo yum clean all
[root@hear yum.repos.d]# mv CentOS-Base.repo CentOS-Base.repo.backup
[root@hear yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
--2020-01-08 00:11:00-- http://mirrors.163.com/.help/CentOS6-Base-163.repo
Resolving mirrors.163.com (mirrors.163.com)... 59.111.0.251
Connecting to mirrors.163.com (mirrors.163.com)|59.111.0.251|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2006 (2.0K) [application/octet-stream]
Saving to: ‘CentOS6-Base-163.repo’
100%[===========================================================================>] 2,006 --.-K/s in 0s
2020-01-08 00:11:00 (192 MB/s) - ‘CentOS6-Base-163.repo’ saved [2006/2006]
[root@hear yum.repos.d]# ls
CentOS6-Base-163.repo CentOS-Debuginfo.repo CentOS-Sources.repo mysql-community.repo
CentOS-Base.repo.backup CentOS-fasttrack.repo CentOS-Vault.repo mysql-community-source.repo
CentOS-CR.repo CentOS-Media.repo epel.repo
[root@hear yum.repos.d]# mv CentOS6-Base-163.repo CentOS-Base.repo
[root@hear yum.repos.d]# yum clear all