ulimit settings are little-known settings to most Linux desktop users, but they are a really painful and often-encountered issue when working with servers. In a nutshell, ulimit settings control many aspects around a process' resource usage just like our Docker resource tweaks we covered earlier and they are applied to every process and shell that has been started. These limits are almost always set on distributions to prevent a stray process from taking down your machine, but the numbers have usually been chosen with regular desktop usage in mind, so trying to run server-type code on unchanged systems is bound to hit at least the open file limit, and possibly some other limits.
We can use ulimit -a to see what our current (also called ...
