Thanks. for answer. I tried: yum clean all yum update It still same problem. --- 09/8/9 (日)，lostson <lostson at lostsonsvault.org> 寫道： > 寄件者: lostson <lostson at lostsonsvault.org> > 主旨: Re: [CentOS] can NOT update CENTOS use YUM > 收件者: centos at centos.org > 日期: 2009年8月9日,日,下午4:04 > > On Mon, 2009-08-10 at 03:59 +0800, mcclnx mcc wrote: > > We have CENTOS 5.1 on DELL server. This server > is OUTSIDE Firewall. I tried to update it to latest > release and get error. > > > > any ideal? > > > > ========================================= > > # yum update > > Loading "fastestmirror" plugin > > Loading mirror speeds from cached hostfile > > Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=i386&repo=os > error was > > [Errno 4] IOError: <urlopen error (111, 'Connection > refused')> > > Error: Cannot find a valid baseurl for repo: base > > try a > > yum clean all > > then a > > yum upgrade > > > -- > LostSon > > http://lostsonsvault.org > > centOS its not just for servers... > > -----內含下列夾帶檔案----- > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > ___________________________________________________ 您的生活即時通 － 溝通、娛樂、生活、工作一次搞定！ http://messenger.yahoo.com.tw/