Am i in the right place

i’m 85, a one-time sequential cobol programmer/analyst at control data
corporation (circa 1970). I need to edit (add, change, delete etc) a
.cvs file imported from Quicken. Is Ruby a good choice for that?

Do you mean a CSV-file (Comma-Separated Values)?

Yes, Ruby is great for doing small command-line scripts. In fact,
there’s a built -in CSV module. Documentation is available here: