Tuesday 11 November 2008

Display IP rather than hostname

When dealing with networking issues, it often helps to be able to use only IP addresses rather than hostnames. Why? For 2 reasons. First, the name server might not always be available if routing is being changed. And most important, you may not have the time to wait for all the IP resolving to be done. Fortunately, many networking utilities in Linux share a common option flag. The -n flag. It will allow you to make the utility display IP addresses rather than hostnames. Here are a few examples:

netstat -an

traceroute 1.2.3.4 -n

arp -n -a -i eth0 -a proxy

These commands were all given the -n flag and will display only IP addresses.

Reference : Suse Linux - 100 tips and tricks by Patrick Lambert

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