In this section you will learn how to get information about the installed operating system, versions of installed development specific software packages, shell and users online:

For function reference and examples we assume, that we imported systeminformation as follows:

const si = require('systeminformation');

Operating System, Shell, Versions, Users

All functions in this section return a promise or can be called with a callback function (parameter cb in the function reference)

Function	Result object	Linux	BSD	Mac	Win	Sun	Comments
si.osInfo(cb)	{...}	X	X	X	X	X	OS information
	platform	X	X	X	X	X	'Linux', 'Darwin', 'Windows'
	distro	X	X	X	X	X
	release	X	X	X	X	X
	codename			X
	kernel	X	X	X	X	X	kernel release - same as os.release()
	arch	X	X	X	X	X	same as os.arch()
	hostname	X	X	X	X	X	same as os.hostname()
	codepage	X	X	X	X		OS build version
	logofile	X	X	X	X	X	e.g. 'apple', 'debian', 'fedora', ...
	serial	X	X	X	X		OS/Host serial number
	build	X		X	X		OS build version
	servicepack				X		service pack version
si.uuid(cb)	{...}	X	X	X	X	X	object of several UUIDs
	os	X	X	X	X		os specific UUID
si.shell(cb)	: string	X	X	X			standard shell
si.versions(cb)	{...}	X	X	X	X	X	version information of node and dev software packages
	kernel	X	X	X	X	X	os kernel version
	openssl	X	X	X	X	X	node openssl version
	systemOpenssl	X	X	X	X	X	os openssl version
	systemOpensslLib	X	X	X	X	X	openSSL, LibreSSL, ...
	node	X	X	X	X	X	node version
	v8	X	X	X	X	X	v8 version
	npm	X	X	X	X	X	npm version
	yarn	X	X	X	X	X	yarn version
	pm2	X	X	X	X	X	pm2 version
	gulp	X	X	X	X	X	gulp version
	grunt	X	X	X	X	X	grunt version
	git	X	X	X	X	X	git version
	tsc	X	X	X	X	X	typescript version
	mysql	X	X	X	X	X	mysql version
	redis	X	X	X	X	X	redis version
	mongodb	X	X	X	X	X	mongodb version
	apache	X	X	X	X	X	apache version
	nginx	X	X	X	X	X	nginx version
	php	X	X	X	X	X	php version
	docker	X	X	X	X	X	docker version
	postfix	X	X	X	X	X	postfix version
	postgresql	X	X	X	X	X	postgresql version
	perl	X	X	X	X	X	perl version
	python	X	X	X	X	X	python version
	python3	X	X	X	X	X	python3 version
	java	X	X	X	X	X	java version
	gcc	X	X	X	X	X	gcc version
	virtualbox	X	X	X	X	X	virtualbox version
si.users(cb)	[{...}]	X	X	X	X	X	array of users online
	[0].user	X	X	X	X	X	user name
	[0].tty	X	X	X	X	X	terminal
	[0].date	X	X	X	X	X	login date
	[0].time	X	X	X	X	X	login time
	[0].ip	X	X	X		X	ip address (remote login)
	[0].command	X	X	X		X	last command or shell