yum install ----转
3.0
[root@kevin-test ~]# rpm -qa|grep -i yum
yum-3.0-6
yum-arch-2.2.2-2.fc6
yum-metadata-parser-1.0-8.fc6
yum-fedorafaq-6-2007.02.03
yum-updatesd-3.0-6
注意相关配置文件修改（FC6）：
[root@kevin-test ~]# cd /etc/
[root@kevin-test etc]# less yum.conf
[main]
cachedir=/var/cache/yum
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
pkgpolicy=newest
distroverpkg=redhat-release
tolerant=1
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
metadata_expire=1800?# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d
这个/etc/yum.conf文件没有更改。
进入/etc/yum.repos.d文件夹，更改以下三个文件的部分内容：
fedora-core.repo? 里的#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/core/$releasever/$basearch/os/ 改为：baseurl=http://archives.fedoraproject.org/pub/archive/fedora/linux/core/$releasever/$basearch/os/fedora-extras.repo? 里的
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/extras/$releasever/$basearch/ 改为：baseurl=http://archives.fedoraproject.org/pub/archive/fedora/linux/extras/$releasever/$basearch/fedora-updates.repo 里的
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/core/updates/$releasever/$basearch/ 改为：baseurl=http://archives.fedoraproject.org/pub/archive/fedora/linux/core/updates/$releasever/$basearch/ ?说明：首先要将这里的注释“#”删除。否则会报错。错误提示如下：
Error: Cannot find a valid baseurl for repo: updates其次需要更改baseurl的链接，可能是redhat已经不提供fedora 6的更新了。错误提示如下：
Trying other mirror.
Error: Cannot open/read repomd.xml file for repository: extras
?
