If your internet connection is behind a web proxy, you need to configure the following on your CentOS server: System-wide proxy settings – add the following lines to your /etc/environment file: # vi /etc/environment http_proxy=”http://proxysrv:8080/” https_proxy=”https://proxysrv:8080/” ftp_proxy=”ftp://proxysrv:8080/” no_proxy=”.mylan.local,.domain1.com,host1,host2″ To apply these settings without restarting the machine run the following commands on the bash shell: export … Read more