head -n <endLine> <filename> | tail -n +<begLine>
for node.js.
var headTail = require('unix-head-tail')
// head -n 7 test.txt | tail -n +3
headTail('test.txt', 3, 7, (err, b) => {
console.log('test.txt lines 3 to 7 are...')
console.log(b.toString())
})