generator.js

const generate = require('csv-generate')
const fs = require('fs')
const minimist = require('minimist')
let args = minimist(process.argv.slice(2), {  
    alias: {
        f: 'file',
        c: 'columns',
        l: 'length'
    }
})
const output = fs.createWriteStream(args.f)
generate({seed: 123456, columns: args.c, length: args.l}).pipe(output)

Usage

$ npm i csv-generate minimist
$ node generator.js -f <output_file.csv> -c <column_number> -l <row_number>