From the webpage:
The TLDR pages are a community effort to simplify the beloved man pages with practical examples.
Try the live demo below, have a look at the pdf version, or follow the installing instructions.
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Be sure to read the Contributing guidelines.
I checked and ngrep isn’t there. 🙁
Well, ngrep only has thirty (30) options and switches before you reach <match expression> and <bpf filter>, so how much demand could there be for examples?
😉
Great opportunity to practice your skills at explanation and creating examples.