os.homedir() Returns the home directory of the current user.

os.freemem() Returns the amount of free system memory in bytes.

os.EOL A constant defining the appropriate End-of-line marker for the operating system.

os.endianness() Returns the endianness of the CPU. Possible values are 'BE' for big endian or 'LE' for little endian.

os.cpus() Returns an array of objects containing information about each CPU/core installed: model, speed (in MHz), and times (an object containing the number of milliseconds the CPU/core spent in: user, nice, sys, idle, and irq). Example inspection of os.cpus: [ { model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz', speed: 2926, times: { user: 252020, nice: 0, sys: 30340, idle: 1070356870, irq: 0 } }, { model: 'Intel(R) Core(TM) i7 CPU 8

os.arch() Returns the operating system CPU architecture. Possible values are 'x64', 'arm' and 'ia32'. Returns the value of process.arch.

Stability: 2 - Stable The child_process module provides the ability to spawn child processes in a manner that is similar, but not identical, to popen(3). This capability is primarily provided by the child_process.spawn() function: const spawn = require('child_process').spawn; const ls = spawn('ls', ['-lh', '/usr']); ls.stdout.on('data', (data) => { console.log(`stdout: ${data}`); }); ls.stderr.on('data', (data) => { console.log(`stderr: ${data}`); }); ls.on('close', (code) => {

Stability: 2 - Stable The child_process module provides the ability to spawn child processes in a manner that is similar, but not identical, to popen(3). This capability is primarily provided by the child_process.spawn() function: const spawn = require('child_process').spawn; const ls = spawn('ls', ['-lh', '/usr']); ls.stdout.on('data', (data) => { console.log(`stdout: ${data}`); }); ls.stderr.on('data', (data) => { console.log(`stderr: ${data}`); }); ls.on('close', (code) => {

Event: 'open' fd <Number> Integer file descriptor used by the WriteStream. Emitted when the WriteStream's file is opened.

Event: 'open' fd <Number> Integer file descriptor used by the ReadStream. Emitted when the ReadStream's file is opened.