I'm trying to figure out how to scan my whole Linux system for all files containing a particular string of text. This ability to discover text strings in files would be very helpful (...)

I would like to change the permissions of a folder and all its subfolders and files in one step (command) in Linux. I have already tried the following command, but it only works (...)

Is it possible to do realtime noise-removal with PulseAudio? And I also want to fix volume auto adjusted. The microphone started at 100% and slowly started to drop. This is because (...)

In my shell script, I need to check if a directory exists or not. So, here what command I should use to verify a directory exist or not in a given path?