| http://www.w3.org/ns/prov#value | - I have installed 4 ubuntu servers on a virtual machine. same installation procedure where i set the proxy, domain, ip during the installation. it appears that 2 of the machine have no issues at all. both ping and apt-get. but for some unknown reason the other 2 can ping anything including security.ubuntu.com and us.archive.ubuntu.com but can not do sudo apt-get update .
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