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Red Hat Enterprise Linux Troubleshooting Guide by Benjamin Cane

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Summary

If we look back at this chapter, we learned quite a bit about troubleshooting network connectivity issues on Linux. We learned how to use the netstat and tcpdump tools to look at the incoming and outgoing connections. We learned about the TCP three-way handshake and how the /etc/hosts file can supersede the DNS settings.

In this chapter, we covered many commands, and while we gave a pretty good overview of each command and what it does, there are some that we barely scratched the surface on.

Commands such as tcpdump are a prime example of this. In this chapter, we used tcpdump quite a bit, but this tool is capable of far more than we used it for. Of all of the commands that we covered in this book, I personally feel that tcpdump is one to ...

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