Linux

Installing and Using Perf in Ubuntu and CentOS

Performance is one of the most complicated parts of systems administration.  Whenever you are trying to investigate the source of bad performance or the reason for the high workload, you need the right tools to do so.

Perf is one of those tools. It’s a performance counter for Linux that you can use to gather data about performance of your system.

How to record Terminal sessions as ASCII video in Ubuntu

There are several times that you might need to record a video of a sequence of commands in terminal. Let it be for a tutorial or for teaching seasons or just for your own reference.

Recording a video does not allow you to copy from it, so you need to provide some transcript of the video if you want your viewers to be able to copy your commands for further use.