are some only osx cli compatible or would be small issues?

[madalinignisca]

"open" works only in OSX, there is no other posix operating system to use it. for example on most Linux distribution it does something different then opening a file with the default app.

[jtsternberg]

I think that's pretty clear here: https://github.com/WebDevStudios/CLI-Cheat-Sheet/blob/master/basic-commands.md

Is there another location we didn't make that clear?