Windows and Linux variable equivalents

Using Windows or Linux comes with its own knowledge. Sometimes is really difficult to switch working to the other OS. That's why I've made my walk-through to ease this transition. If you find something wrong or incomplete please comment below and I'll fix it.

The table below and the previous one: Windows cmd vs Linux shell commands are part of my Lab Diary, which I intend to post on pages on these blog and site. It contains more than 5000 articles, code snippets, best practices and my experience in IT world.

Windows - Linux equivalent variables table

Variable/Command

Windows

Example

Linux

Example2

Explanation

TEMP

%TEMP%

C:\WINDOWS\Temp

$TMPDIR
$TMP
$TEMP

/tmp
/var/tmp

What directory is used as tempory folder for program data.

PATH

%PATH%

C:\Windows\

$PATH

All directories that the system will check when looking for commands.

User home

%USERPROFILE%

C:\Users\user

$HOME

/home/user

The current user's home directory.

USER

%USERNAME%

$USER

user

The current logged in user.

User id

wmic useraccount get name,sid

S-1-5-21…

$UID

1

The UID of  user.

Current folder

CD

C:\Users\user

$PWD

/home/user

The current working folder.

Application data

%APPDATA%

C:\Users\{username}\AppData\Roaming

/home/user/.<application>/profiles/

Application data folder

Domain

%USERDOMAIN%

domain

HOSTNAME

domain

The hostname of the computer.

Operating System

%OS%

Windows_NT

uname -a

Linux localhost 3.11.

The OS version

Languages get environmental variables table

Language

What

Code

result

python

Get variable

import os
print os.environ['HOME']

C:\Users\user' - windows
'/home/user' - linux

python

Get all

import os
print os.environ

{'TMP': 'C:\\Users\..'

python

Get all formatted

import os
for var in os.environ:
    print('Var: ', var, 'Value: ', os.getenv(var))

('Var: ', 'OS', 'Value: ', 'Windows_NT')
('Var: ', 'PUBLIC', 'Value: ', 'C:\\Users\\Public')

python

Set variable

import os
os.environ['VAR'] = str(value)
os.environ['VAR'] = value

java

Get variable

System.getenv("HOME");

C:\Users\user - windows
/home/user - linux

java

Get all

System.getenv();

 {TEMP="C:\Users..}

java

Get all formatted

Map<String, String> var = System.getenv();
for (String varName : var.keySet()) {
    System.out.format("%s=%s%n", varName, var.get(varName));
}

node.js

Get variable

process.env.HOME;

node.js

Set variable

process.env.VAR = "value";

C#

Get variable

System.Environment.GetEnvironmentVariable ("HOME")

C#

Set variable

System.Environment.SetEnvironmentVariable("VAR", "val")

C

Get variable

value = getenv ("HOME");

C

Set variable

setenv ("VAR", "value", 0);

Python get set env variables

import os
print os.environ['HOME']
print os.environ
for var in os.environ:
    print('Var: ', var, 'Value: ', os.getenv(var))
os.environ['VAR'] = str(value)
os.environ['VAR'] = value

Java get set env variables

System.getenv("HOME");
System.getenv();
Map<String, String> var = System.getenv();
for (String varName : var.keySet()) {
    System.out.format(""%s=%s%n"", varName, var.get(varName));
}

Node.JS get set env variables

process.env.HOME;
process.env.VAR = "value";

C# get set env variables

System.Environment.GetEnvironmentVariable ("HOME")
System.Environment.SetEnvironmentVariable("VAR", "val")

C get set env variables

value = getenv ("HOME");
setenv ("VAR", "value", 0);

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