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Dear all I have centos 6.0 in my system and i want to update packages, so i tried the yum commands for checking and installing updates, but my proxy is objecting and i got the following error 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: