Tmux is great. Tmux defaults are not. How to make use of a brilliant tool without breaking your fingers?

A collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users, a compact and practical reference.

In these tcpdump examples you will find 22 tactical commands to zero in on the key packets. Know your network with this powerful packet capture tool. Examples for http, icmp, dns, snmp and more.

Using sar you can monitor performance of various Linux subsystems (CPU, Memory, I/O..) in real time. Using sar, you can also collect all performance data on an on-going basis, store them, and do historical analysis to identify bottlenecks. Sar is part of the sysstat package. This article explains how to install and con

This talk discusses Linux profiling using perf_events (also called "perf") based on Netflix's use of it. It covers how to use perf to get CPU profiling working and overcome common issues. The speaker will give a tour of perf_events features and show how Netflix uses it to analyze performance across their massive Amazon EC2 Linux cloud. They rely on tools like perf for customer satisfaction, cost optimization, and developing open source tools like NetflixOSS. Key aspects covered include why profiling is needed, a crash course on perf, CPU profiling workflows, and common "gotchas" to address like missing stacks, symbols, or profiling certain languages and events.