Advanced Network Troubleshooting
Besides the simple network tests shown in the previous section, Linux has some more advanced programs that can provide more detailed information about the network environment. Sometimes it helps to be able to see just what network connections are active on a Linux system. There are two ways to troubleshoot that issue: the netstat command and the ss command.
The netstat Command
The netstat command is part of the net-tools package and can provide a wealth of network information for you. By default, it lists all the open network connections on the system:
The netstat command produces lots ...
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