In Windows (e.g. version 10) you can list environment variables using the command
How do you list just the environment variables that are the same for all users or just the environment variables that are for the current user or session?
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Things are a little more complicated than Microsoft sometimes make it seem.
A lot of the environment variables are stored in the Registry. This means you can query them using the
reg query "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment"
reg query HKCU\Environment reg query "HKCU\Volatile Environment"
If you permanently set your own environment variable using the
setx variable value command it is stored in the registry but not made immediately available.
C:\>setx test removeme SUCCESS: Specified value was saved. C:\>reg query "HKCU\Environment" HKEY_CURRENT_USER\Environment Path REG_EXPAND_SZ %USERPROFILE%\AppData\Local\Microsoft\WindowsApps; TEMP REG_EXPAND_SZ %USERPROFILE%\AppData\Local\Temp TMP REG_EXPAND_SZ %USERPROFILE%\AppData\Local\Temp test REG_SZ removeme
If you use the
set variable=value command, the variable is available immediately but is not stored in the registry. You cannot use the
reg command to list them although they are shown by
set. These temporary environment variables do not persist after you end the command-prompt session.
There are constructs that act like environment variables that are not stored in the registry in this way. For example:
For clean output without extra lines and black spaces use the following commands in
User environment variables:
FOR /F "tokens=1,3* skip=2" %G IN ('reg query HKCU\Environment') DO @echo %G=%H %I
Global (system) environment variables:
FOR /F "tokens=1,3* skip=2" %G IN ('reg query "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment"') DO @echo %G=%H %I
It works in Windows 7-10, and most probably in earlier versions as well.