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		OS/Host serial number
	build			X	X		OS build 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 (kernel, ssl, node, ...)
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