Ubuntu 22.04 Network Diagnostic Handbook

This article provides a comprehensive guide on how to diagnose network interfaces in Ubuntu 22.04. It covers various methods, such as using the `ip` command, checking the routing table, and testing HTTP connections. The article also introduces the `networkctl` command, which supports various operations like renewing DHCP leases and bringing interfaces up or down. The author provides step-by-step instructions and examples to help readers follow along. Overall, this article is a useful resource for Ubuntu users who need to troubleshoot network issues.--GPT 4