arun kumar said the following on 19/07/2012 13:31: > bash-4.1# yum update > Loaded plugins: fastestmirror, refresh-packagekit > Loading mirror speeds from cached hostfile > Could not retrieve mirrorlist > http://mirrorlist.centos.org/?release=6&arch=i386&repo=os error was > 14: PYCURL ERROR 22 - "The requested URL returned error: 407" > Error: Cannot find a valid baseurl for repo: base Check that file /etc/yum.repos.d/CentOS-Base.repo contains this: [base] name=CentOS-$releasever - Base mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 Ciao, luigi -- / +--[Luigi Rosa]-- \ You will never remember the many times the launch slipped, but the one-time failures are with you always. --Walt Williams, NASA, durante la cerimonia finale del progetto Mercury