In openSUSE, you can set the HTTP Proxy in YaST. but this setting is independent of $http_proxy in shell which means you cannot get the current proxy setting by the following command

• echo $http_proxy

Actually the you can find the proxy setting in /etc/sysconfig/proxy.

To obtain the current proxy setting, u can make use of the following command

• cat /etc/sysconfig/proxy | egrep ^HTTP_PROXY | cut -d "\"" -f 2

Done =)