linux 基础操作(十二)yum 源配置

yum 安装问题

[root@localhost ~]# yum install vim
Loaded plugins: fastestmirror
Determining fastest mirrors
Could not retrieve mirrorlist error was
14: curl#56 - "Recv failure: Connection reset by peer"

 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64


[root@localhost ~]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# ls
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]# rm -rf CentOS-*
[root@localhost yum.repos.d]# ls

[root@localhost ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo   
[root@localhost ~]# cd /etc/yum.repos.d/ 
[root@localhost yum.repos.d]# ls   
[root@localhost yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors
[root@localhost yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
 * base:
 * extras:
 * updates:
base                                                                                                                                  | 3.6 kB  00:00:00     
extras                                                                                                                                | 2.9 kB  00:00:00     
updates                                                                                                                               | 2.9 kB  00:00:00     
base/7/x86_64/primary_db       FAILED                                  [Errno 14] curl#6 - "Could not resolve host:; Unknown error"
Trying other mirror.
(1/10): base/7/x86_64/group_gz                                                                                                        | 153 kB  00:00:00     
(2/10): extras/7/x86_64/other_db                                                                                                      | 134 kB  00:00:00     
(3/10): extras/7/x86_64/filelists_db                                                           
[root@localhost yum.repos.d]# yum install vim
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base:
 * extras:
 * updates:
Resolving Dependencies