New vids on shell scripting and substring removal

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Yesterday and just a bit ago I put out two videos of extreme relevance if you want to script efficiently:

Now the first formally was about writing a network traffic module without dependencies, we talking about the file location of network information, shell arithmatic and some other efficiencies.

The second video is on an important trick for getting a substring from a string without having to call separate programs like awk or cut, and thus saving time. That is, substring removal, which you've probably seen before. It looks something like this:

echo "${fullfilename%.*}"

That particular command will echo a file name removing its extension. I explain the logic of what all the symbols mean and how to manipulate them in the video.