yum [Errno 256] No more mirrors to try.

今天公司搬个家电脑不能用yum了

[root@localhost ~]# yum update

Loaded plugins: product-id, refresh-packagekit, security, subscription-manager

Updating certificate-based repositories.

Unable to read consumer identity

file:///mnt/cdrom/repodata/repomd.xml: [Errno 14] Could not open/read file:///mnt/cdrom/repodata/repomd.xml

Trying other mirror.

Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

[root@localhost ~]# yum -y install postgresql

Loaded plugins: product-id, refresh-packagekit, security, subscription-manager

Updating certificate-based repositories.

Unable to read consumer identity

file:///mnt/cdrom/repodata/repomd.xml: [Errno 14] Could not open/read file:///mnt/cdrom/repodata/repomd.xml

Trying other mirror.

Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

[root@localhost ~]# cat /etc/yum.repos.d/rhel-debuginfo.repo

cat: /etc/yum.repos.d/rhel-debuginfo.repo: No such file or directory

[root@localhost ~]# vi /etc/yum.repos.d/rhel-debuginfo.repo

网上出现这个问题的多，但原因却不尽如一，现在说一说我的排查和解决的过程吧：

先看看源：

[root@localhost ~]# cd /etc/yum.repos.d/

[root@localhost yum.repos.d]# ll

total 16

-rw-r--r--. 1 root root 124 Feb 11 18:37 CentOS-Media.repo

-r--r--r-- 1 root root 114 Jun 13 2012 packagekit-media.repo

-r--r--r--. 1 root root 114 Jun 13 2012 packagekit-media.repo.bak

-rw-r--r--. 1 root root 529 May 30 2012 rhel-source.repo.bak

[root@localhost yum.repos.d]# vi /etc/yum.repos.d/CentOS-Media.repo

[base]

name=RedHat

baseurl=file:///mnt/cdrom

enabled=1

gpgcheck=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

看来我是用的本地源，那就是要先挂载咯

root@localhost yum.repos.d]# mount /dev/cdrom1 /mnt/cdrom

就这样解决了！