Troubleshooting

GPO Troubleshooting with gpresult and RSoP

How to diagnose Group Policy application problems using gpresult, the Resultant Set of Policy snap-in, gpupdate, and Group Policy event logs.

Kubernetes Troubleshooting

A systematic approach to diagnosing failing pods, networking issues, and cluster-level problems using kubectl, events, and logs as your primary evidence.

Network Troubleshooting Tools

Learn how ping, traceroute, netstat/ss, and nslookup/dig work under the hood to diagnose connectivity, routing, and DNS issues.

What is Ping and How Does It Work?

Ping is a network diagnostic utility that sends ICMP Echo Request packets to a target host and measures whether it replies with an ICMP Echo Reply, reporting r…

What is Traceroute and How Does It Work?

Traceroute is a network diagnostic tool that reveals the sequence of routers (hops) a packet passes through to reach a destination, by sending probe packets wi…

What is netstat?

netstat is a command-line utility that displays active network connections, listening ports, routing tables, and per-protocol statistics on a host, making it a…

What is nslookup?

nslookup is a command-line tool that queries DNS servers to resolve a domain name to its IP address, or an IP address back to a domain name, and can also fetch…

What is Wireshark?

Wireshark is a free, open-source network protocol analyzer that captures traffic passing through a network interface and lets an engineer inspect every packet…