Node JS এর ফাইল সিস্টেম ঃ read, write, rename, delete

Node JS start.txt

//রিড ফাইল 
var fs = require('fs'); // Node module er file system ta k include korese
fs.readFile('/Users/Shaad/Desktop/Node/node.rtf', 'utf8', function(err, data){ //fs.readFile diye file read option initate korese, then convert it into utf8 format
	if (err) {
		console.log(err); //if kono error thake tahole console a err msg show korbe
	}
	console.log(data) // otherwise data read kore file content show korbe
});

// ফাইল রাইট করা 
var fs = require('fs');
fs.createReadStream('node.rtf').pipe(fs.createWriteStream('node1.txt')); 

// ফাইল রিনেইম করা 
var fs = require('fs');
fs.rename ('/Users/Shaad/Desktop/Node/node1.txt', '/Users/Shaad/Desktop/Node/nodejs.txt', function(err) {
	if (err) throw err;
	console.log('rename complete');
});

//ফাইল ডিলেট করা 
var fs = require('fs');
fs.unlink('/Users/Shaad/Desktop/Node/nodejs.txt', function (err) {
  if (err) throw err;
  console.log('successfully deleted /Users/Shaad/Desktop/Node/nodejs.txt');
});


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		Combinedly Done!
***********************************************************

var fs = require('fs');
fs.writeFile('/Users/Shaad/Desktop/Node/node.txt', 'Hello Node', function (err) {
	if (err) throw err;
	console.log('It\'s saved!');
	fs.createReadStream('node.txt').pipe(fs.createWriteStream('delete.txt'));
	fs.readFile('/Users/Shaad/Desktop/Node/node.txt', 'utf8', function(err, data){ //fs.readFile diye file read option initate korese, then convert it into utf8 format
		if (err) {
			console.log(err); //if kono error thake tahole console a err msg show korbe
		}
		console.log(data) // otherwise data read kore file content show korbe
	});
	fs.appendFile('/Users/Shaad/Desktop/Node/node.txt', '...whatssapp!', encoding='utf8', function (err) {
		if (err) throw err;
		console.log("data appended");
	});

	fs.rename ('/Users/Shaad/Desktop/Node/node.txt', '/Users/Shaad/Desktop/Node/nodejs.txt', function(err) {
		if (err) throw err;
		console.log('rename complete');
	});

	fs.unlink('/Users/Shaad/Desktop/Node/delete.txt', function (err) {
	  if (err) throw err;
	  console.log('successfully deleted /Users/Shaad/Desktop/Node/delete.txt');
	});

});

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Output: কিছু কনফিউশন আছে 

It's saved!
rename complete
successfully deleted /Users/Shaad/Desktop/Node/delete.txt
data appended
Hello Node
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