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優化yum下載安裝慢,不斷換mirror

不停地換mirror,為了解決這個問題,在網上搜了好多資料,總結出一個基於aliyun的mirror源

先檢查:是否能正常上網,DNS是否正常,閘道器gw是否正常,若通過ping 不正常,則解決好網路,再進行下面操作.

 

1. 清除快取

[[email protected] ~]#  yum clean all
已載入外掛:fastestmirror
正在清理軟體源: base extras updates
Cleaning up everything
Maybe you want: rm -rf /var/cache/yum, to also free up space taken by orphaned data from disabled or removed repos
Cleaning up list of fastest mirrors

2.元資料建立

[[email protected] ~]#  yum makecache
已載入外掛:fastestmirror
Determining fastest mirrors
 * base: mirrors.cn99.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
base                                                                          | 3.6 kB  00:00:00     
extras                                                                        | 3.4 kB  00:00:00     
updates                                                                       | 3.4 kB  00:00:00     
(1/12): base/7/x86_64/group_gz                                                | 166 kB  00:00:01     
(2/12): extras/7/x86_64/prestodelta                                           | 100 kB  00:00:00     
(3/12): extras/7/x86_64/filelists_db                                          | 603 kB  00:00:02     
(4/12): extras/7/x86_64/other_db                                              | 126 kB  00:00:00     
(5/12): extras/7/x86_64/primary_db                                            | 205 kB  00:00:01     
(6/12): base/7/x86_64/filelists_db                                            | 6.9 MB  00:00:02     
(7/12): base/7/x86_64/primary_db                                              | 5.9 MB  00:00:03     
(8/12): updates/7/x86_64/prestodelta                                          | 679 kB  00:00:01     
(9/12): updates/7/x86_64/other_db                                             | 578 kB  00:00:01     
(10/12): updates/7/x86_64/filelists_db                                        | 3.4 MB  00:00:02     
(11/12): updates/7/x86_64/primary_db                                          | 6.0 MB  00:00:02     
(12/12): base/7/x86_64/other_db                                               | 2.5 MB  00:00:06     
元資料快取已建立

3. 更新

[[email protected] ~]#  yum update
已載入外掛:fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.cn99.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
No packages marked for update

4.備份yum源 

[[email protected] ~]#  cd /etc/yum.repos.d/
[[email protected]
yum.repos.d]# ls CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo CentOS-CR.repo CentOS-fasttrack.repo CentOS-Sources.repo [[email protected] yum.repos.d]# mv CentOS-Base.repo CentOS-Base.repo.backup [[email protected] yum.repos.d]# ls CentOS-Base.repo.backup CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo CentOS-CR.repo CentOS-fasttrack.repo CentOS-Sources.repo

5. 下載新的CentOS-Base.repo 到/etc/yum.repos.d/ 

  再建立快取

[[email protected] yum.repos.d]#  wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
--2018-12-02 17:55:13--  http://mirrors.aliyun.com/repo/Centos-7.repo
正在解析主機 mirrors.aliyun.com (mirrors.aliyun.com)... 183.61.14.235, 183.61.14.231, 183.61.14.236, ...
正在連線 mirrors.aliyun.com (mirrors.aliyun.com)|183.61.14.235|:80... 已連線。
已發出 HTTP 請求,正在等待迴應... 200 OK
長度:2523 (2.5K) [application/octet-stream]
正在儲存至: “/etc/yum.repos.d/CentOS-Base.repo”

100%[===========================================================>] 2,523       --.-K/s 用時 0s      

2018-12-02 17:55:18 (107 MB/s) - 已儲存 “/etc/yum.repos.d/CentOS-Base.repo” [2523/2523])

[[email protected] yum.repos.d]# yum makecache 已載入外掛:fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to mirrors.aliyuncs.com:80; 拒絕連線" 正在嘗試其它映象。 http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.cloud.aliyuncs.com; 未知的錯誤" 正在嘗試其它映象。 base | 3.6 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 元資料快取已建立