Node.js fsPromises.chown() Method Last Updated : 08 Oct, 2021 Comments Improve Suggest changes Like Article Like Report The fsPromises.chown() method is used to change the ownership of a file then resolves the Promise with no arguments upon success. The function accepts a user id and group id that can be used to set the respective owner and group. Syntax: fsPromises.chown( path, uid, gid) Parameters: This method accepts threeparameters as mentioned above and described below: path: It is a String, Buffer or URL that denotes the path of the file of which the owner and group has to be changed.uid: It is an integer that denotes the user id that corresponds to the owner to be set.gid: It is an integer that denotes the group id that corresponds to the group to be set. JavaScript // Node.js program to demonstrate the // fsPromises.chown() method // Import the filesystem module const fs = require('fs'); let filepath = "example_file.txt"; // Set the owner to a new one keeping the group same // New owner is "GeeksforGeeks" with user id 4567 fsPromises.chown(filepath, 4567, 999 => { console.log("uid and gid set successfully."); }); Before Running the Code: xubuntu@xubuntu: ~/Desktop/fs-chown$ ls -l total 8 -rw-rw--w- 1 xubuntu xubuntu 4 May 26 04:08 example_file.txt -rw-rw-r-- 1 xubuntu xubuntu 290 May 26 04:08 index.js Output of the Code: Given uid and gid set successfully . After Running the Code: xubuntu@xubuntu: ~/Desktop/fs-chown$ ls -l total 8 -rw-rw--w- 1 geeksforgeeks xubuntu 4 May 26 04:08 example_file.txt -rw-rw-r-- 1 xubuntu xubuntu 290 May 26 04:08 index.js Example 2: This example shows the setting of the group. JavaScript // Node.js program to demonstrate the // fsPromises.chown() method // Import the filesystem module const fs = require('fs'); let filepath = "example_file.txt"; // Set the owner and group both to a new one // New owner is "nitin" with owner id 8900 // New group is "author" with group id 1024 fsPromises.chown(filepath, 8900, 1024 => { console.log("uid and gid set successfully!"); }); Before Running the Code: xubuntu@xubuntu: ~/Desktop/fs-chown$ ls -l total 8 -rw-rw--w- 1 xubuntu xubuntu 4 May 26 04:19 example_file.txt -rw-rw-r-- 1 xubuntu xubuntu 290 May 26 04:19 index.js Output of the Code: Given uid and gid set successfully! After Running the Code: xubuntu@xubuntu: ~/Desktop/fs-chown$ ls -l total 8 -rw-rw--w- 1 nitin author 4 May 26 04:19 example_file.txt -rw-rw-r-- 1 xubuntu xubuntu 290 May 26 04:19 index.js Comment More infoAdvertise with us N nitin_sharma Follow Improve Article Tags : Web Technologies Node.js Node.js-fs-module Similar Reads Node JS fs.readFile() Method ​In Node.js, the fs.readFile() method is a fundamental tool for reading files asynchronously, allowing your application to remain responsive while accessing file data. This method is part of Node.js's File System (fs) module, which provides an API for interacting with the file system.Syntaxfs.readFi 3 min read Node.js fs.exists() Method The fs exists method in node is used to check if the input file or the directory exists or not. It is an inbuilt application programming interface of fs module which provides an API for interacting with the file system in a manner closely modeled around POSIX functions. Syntax:fs.exists( path, callb 2 min read Node fs.existsSync() Method In Node.js, the fs.existsSync() method checks if a file or folder exists at a given path. It's synchronous, meaning it pauses the program until it finds the result (either true if it exists, or false if it doesn't). Because it stops everything while it works, it’s best used for quick checks in small 3 min read Node fs.mkdir() Method The fs.mkdir() method in Node.js is used to create a directory asynchronously.Syntaxfs.mkdir(path, mode, callback)Parameters: This method accepts three parameters as mentioned above and described below: path: This parameter holds the path of the directory that has to be created.mode: This parameter 2 min read Node.js fs.truncate() Method The fs.truncate() method in node.js is used to change the size of the file i.e either increase or decrease the file size. This method changes the length of the file at the path by len bytes. If len represents a length shorter than the file's current length, the file is truncated to that length. If i 2 min read Node.js fs.renameSync() Method In Node.js, the fs.renameSync() method is part of the built-in File System (fs) module and is used to rename or move files and directories synchronously. This method is useful when you need to quickly change a file's name or move it to a different directory synchronously. It blocks the execution of 3 min read Node.js fs.rmdir() Method The fs.rmdir() method is used to delete a directory at the given path. It can also be used recursively to remove nested directories.Syntax: fs.rmdir( path, options, callback )Parameters: This method accepts three parameters as mentioned above and described below: path: It holds the path of the direc 3 min read Node.js fs.stat() Method The fs.stat() method is used to return information about the given file or directory. It returns an fs.Stat object which has several properties and methods to get details about the file or directory. Syntax:fs.stat( path, options, callback )Parameters: This method accept three parameters as mentione 3 min read Node.js fs.mkdtempSync() Method The fs.mkdtempSync() method is an inbuilt application programming interface of fs module which provides an API for interacting with the file system in a manner closely modeled around standard POSIX functions. The fs.mkdtempSync() method creates a unique temporary directory. This is the synchronous v 2 min read Node.js fs.realpath() Method The fs.realPath() method is used to compute the canonical pathname of the given path. It does so by resolving the ., .. and the symbolic links in the path. Syntax: fs.realpath( path, options, callback ) Parameters: This method accept three parameters as mentioned above and described below: path: It 3 min read Like