Yum 更新錯誤

最近各伺服器在做 Yum 更新時皆出現錯誤，如下

yum -y update
Setting up Update Process
Setting up Repos
ftp://apt.nc.hcc.edu.tw/pub/fedora/linux/core/3/i386/os/repodata/repomd.xml: [Errno 4] IOError: [Errno ftp error] 500 OOPS: vsftpd: refusing to run with writable anonymous root
Trying other mirror.
Cannot open/read repomd.xml file for repository: base
failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.

後來用 FTP 軟體試著連上 apt.nc.hcc.edu.tw ，該伺服器無法以 anonymous 連上 ...??? 是把服務關掉了嗎？沒辦法，只好捨近求遠，改回預設的設定。

FC3 到這邊除了比較慢一點之外應該是沒問題了，接下來 FC5 的更新出問題：

yum -y update
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
core [1/4]
core 100% |=========================| 951 B 00:00
crash-hat [2/4]
http://crash.fce.vutbr.cz/crash-hat/5/repodata/repomd.xml: [Errno 14] HTTP Error 404: Date: Mon, 03 Mar 2008 02:02:02 GMT
Server: Apache/2.2.6 (Fedora)
Content-Length: 312
Connection: close
Content-Type: text/html; charset=iso-8859-1
Trying other mirror.
Cannot open/read repomd.xml file for repository: crash-hat
failure: repodata/repomd.xml from crash-hat: [Errno 256] No more mirrors to try.
Error: failure: repodata/repomd.xml from crash-hat: [Errno 256] No more mirrors to try.

連到 crash.fce.vutbr.cz 發現該伺服器只剩下 centos 的更新，所以應該是不能用了，在網路上找到了另一台 Server ，把 /etc/yum.repo.d/crash-hat.repo 中的設定改成

baseurl=http://crash-hat.mirrors.redwire.net/crash-hat/$releasever/

OK了！