- There's a lot of info here, so I think you should aim for curation and conciseness, rather than completeness. For example, in File Test Operators, your first two entries (effectively, the first two entries a visitor sees) is `-e` and `-a`, both of which you describe as "File exists", though for the latter, you write: "(identical to -e but is deprecated and outdated)". Is there any reason for `-a` to be included if it's not useful? When I use a cheatsheet, I just want what's most useful, not a full historical reference.
- This is a minor thing, and very much imho, but it was a little distracting to see Times New Roman (or rather, the Mac default serif font) as the base font for the descriptive text, which is a font that I associate with an unstyled (i.e. unpolished) website. IMHO , it looks a bit better in Georgia, or a sans-serif like "Helvetica Neue". Again, just imho, I'm sure others might vehemently disagree.
- The associated twitter handle looks like @shellmagic1 – why not use the handle @shellmagicxyz, which is currently unused?