yum install 故障记录

今天在安装 yum install nethogs 的时候，总是提示错误。

[root@localhost yum.repos.d]# yum install nethogs
Loaded plugins: fastestmirror, refresh-packagekit, security
Setting up Install Process
Determining fastest mirrors
 * base: mirror.bit.edu.cn
 * extras: mirrors.163.com
 * updates: mirrors.163.com
base                                                                                          | 3.7 kB     00:00     
base/primary_db                                                                               | 3.7 MB     00:01     
extras                                                                                        | 3.3 kB     00:00     
extras/primary_db                                                                             |  21 kB     00:00     
updates                                                                                       | 3.4 kB     00:00     
updates/primary_db                                                                            | 6.8 MB     00:02     
No package nethogs available.
Error: Nothing to do

最后，打开 /etc/yum.repos.d/   ll命令后发现没有epel的源，就下载了epel的源

wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

[root@localhost yum.repos.d]# ll
total 44
-rw-r--r--. 1 root root  1926 Jun 26  2012 CentOS-Base.repo
-rw-r--r--  1 root root  2572 Jul  2  2014 CentOS-Base.repo1
-rw-r--r--. 1 root root   637 Jun 26  2012 CentOS-Debuginfo.repo
-rw-r--r--. 1 root root   626 Jun 26  2012 CentOS-Media.repo
-rw-r--r--. 1 root root  2593 Jun 26  2012 CentOS-Vault.repo
-rw-r--r--  1 root root 14540 Nov  5  2012 epel-release-6-8.noarch.rpm
-rw-r--r--  1 root root   957 Nov  5  2012 epel.repo
-rw-r--r--  1 root root  1056 Nov  5  2012 epel-testing.repo

在rpm安装的时候，出现个问题，我的电脑上装了有个高版本的epel，如下所示：epel 7.5已安装，想在/etc/yum.repos.d下生成的文件与6.8的矛盾，所以需要卸载7.5

yum repolist是查看 有哪些源，可以看到还没有安装epel源

[root@localhost yum.repos.d]# rpm -ivh epel-release-6-8.noarch.rpm 
warning: epel-release-6-8.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
Preparing...                ########################################### [100%]
        package epel-release-7-5.noarch (which is newer than epel-release-6-8.noarch) is already installed
        file /etc/yum.repos.d/epel-testing.repo from install of epel-release-6-8.noarch conflicts with file from package epel-release-7-5.noarch
        file /etc/yum.repos.d/epel.repo from install of epel-release-6-8.noarch conflicts with file from package epel-release-7-5.noarch
[root@localhost yum.repos.d]# yum repolist
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: mirror.bit.edu.cn
 * extras: mirrors.sohu.com
 * updates: mirrors.sohu.com
repo id                                           repo name                                                    status
base                                              CentOS-6 - Base                                              5,079
extras                                            CentOS-6 - Extras                                               20
updates                                           CentOS-6 - Updates                                             974
repolist: 6,073
[root@localhost yum.repos.d]# ll

检查安装的rpm包 

[root@localhost yum.repos.d]# rpm -qa | grep epel
epel-release-7-5.noarch

卸载，即可。

[root@localhost yum.repos.d]# rpm -e epel-release-7-5.noarch
error: Failed dependencies:
        epel-release >= 7 is needed by (installed) webtatic-release-7-3.noarch
[root@localhost yum.repos.d]# rpm -e webtatic-release-7-3.noarch
[root@localhost yum.repos.d]# rpm -e epel-release-7-5.noarch 

最后

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