Node.js process.seteuid() Method Last Updated : 28 Apr, 2025 Comments Improve Suggest changes Like Article Like Report The process.seteuid() method is an inbuilt application programming interface of the process module which is used to set the effective user identity of the Node.js process. Syntax: process.seteuid( id ) Parameters: This method accepts single parameter as mentioned above and described below: id: It is a required parameter that holds a String or an integer that denotes either numeric ID or username string. If username is passed, it blocks while resolving the associated numeric ID. Return Value: It does not return any value. Note: This function will only work on POSIX platforms. It is not available on windows or android platform so will cause an error i.e. TypeError, seteuid is not a function. Below examples illustrate the use of process.seteuid() method in Node.js: Example 1: JavaScript // Node.js program to demonstrate the // process.seteuid() method // Include process module const process = require('process'); // Printing the effective user identity // of the Node.js process and checking // whether the method exists or not if (process.geteuid && process.seteuid ) { // Setting user id process.seteuid(400); // Printing geteuid() console.log("The effective user identity " + "of the Node.js process:" + process.geteuid()); } Output: The effective user identity of the Node.js process: 400 Example 2: JavaScript // Node.js program to demonstrate the // process.seteuid() method // Include process module const process = require('process'); // Setting user id and checking whether // the method exists or not if (process.seteuid) { // Within try catch try { process.seteuid(696); console.log("User id has successfully been set"); } catch (err) { console.log("Failed to set user id:", err); } } // Checking whether the method exists or not if (process.geteuid) { // Printing geteuid() value console.log("The numerical effective user " + "identity of the Node.js process:" + process.geteuid()); } Output: User id has successfully been set The numerical effective user identity of the Node.js process: 696 Note: The above program will compile and run by using the node filename.js command. Reference: https://nodejs.org/api/process.html#process_process_seteuid_id Comment More infoAdvertise with us Next Article Node.js process.seteuid() Method G gekcho Follow Improve Article Tags : Web Technologies Node.js Node.js-process-module Similar Reads Node.js process.chdir() Method The process.chdir() method is an inbuilt application programming interface of the process module which is used to change the current working directory. Syntax: process.chdir( directory ) Parameters: This method accepts single parameter as mentioned above and described below: directory: It is require 2 min read Node.js process.cpuUsage() Method The process.cpuUsage() method is an inbuilt application programming interface of the Process module which is used to get the user, system CPU time usage of the current process. It is returned as an object with property user and system, values are in microseconds. 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