9 Tips to diagnose remote GNU/Linux server network connectivity issues

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HowTos

Many new admin or Linux users get frustrated when their remote Linux box is not accessible dues to network connectivity. In this article I will try to provide tools and information about how to diagnose network configurations. You can try these tips/tools to diagnose an issue of Linux network connectivity to remote or local servers.

Steps to diagnose the problem:

#1: Use ping command

Always ping the IP address of server and then try hostname. For example:

$ ping 75.126.43.232
$ ping cyberciti.biz

#2: Use traceroute command

If you cannot ping your server at all, use traceroute to trace network problem.

#3: Look for default route / gateway IP

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