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.rpmrpm -ivh 它就行了。
[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