Shell prerequisites for hpc-intro

[wirawan0]

Hi all: I am starting this thread as a way to gather the explicit prerequisites of shell skills in order to successfully participate in the hpc-intro lesson. The shell prerequisites are (most explicitly) stated here right now:

https://carpentries-incubator.github.io/hpc-intro/learner-prerequisites/index.html

which basically boils down to:

• Moving Around (navigating filesystem)
• Extended file operation (e.g. batch renames)
• Understanding command-line flags
• Basic shell scripting

The "pre-workshop survey" has a number of questions that are diagnostics of learner's shell abilities.

#428 contains a request to add contents on shell environment variable, which are often used in scientific applications.

Anything else that I may miss, please add. It will be good to put these things explicitly somewhere in the lesson so instructors are clear of what skills are essentially required.