I'm also under proxy server and yum work like ... charm. You can find manual in http://www.centos.org/docs/4/html/yum/sn-yum-proxy-server.html. I'm usualy edit /etc/yum.conf and put there #proxy adress:port - take care of / proxy=http://proxy.somedomain.si:80/ #proxy username and passwd proxy_username= proxy_password= Have a nice day. Blaž -----Original Message----- Message: 2 Date: Mon, 20 Jul 2009 12:17:49 -0400 From: Alberto Garc?a G?mez <alberto at ipimtzcm.rimed.cu> Subject: [CentOS] YUM Proxy To: "CentOS mailing list" <centos at centos.org> Message-ID: <001a01ca0955$9ff627e0$091010ac at www> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Dear Fellows: I'm under a proxy server (squid) and I need to update my centos but every time that I run yum -y update tells me that I can no find a file that exists. The problems is that this machine that I'm trying to update has no graphic shell, so I need to make all by console. Saludos Fraternales _____________________________ Atte. Alberto Garc?a G?mez M:.M:. Administrador de Redes/Webmaster IPI "Carlos Marx", Matanzas. Cuba.