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How to set environmental variables in Windows 7 using a batch file ?

Posted on 2010-11-08
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Last Modified: 2012-05-10

I have a Windows 7 PC and I wanted to set the environmental variables.

I know I can right click on MYCOMPUTER=> Advanced tab and set there SYSTEM EV.

But instead of doing that I wanted to write a windows batch file (.BAT) and do it.

How can I do that.

If i go to command line and use the SET command , is it only for that particular session, once we close and reopen another session the EV are no longer there.

I wanted to set the EV permanent, same way as what we do using GUI, but using a windows batch file (.bat).

Give me the commands or some sample script

Thanks in advance
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Question by:OCUBE
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10 Comments
 
LVL 20

Expert Comment

by:netcmh
ID: 34086232
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Author Comment

by:OCUBE
ID: 34086286


All  need to know is the command to setup the EV in command prompt and it should
be permanent, not just for that session.


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Accepted Solution

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Bill Prew earned 500 total points
ID: 34086884
You can do this with the SETX command from the command line.

http://technet.microsoft.com/en-us/library/cc755104%28WS.10%29.aspx

~bp
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Expert Comment

by:netcmh
ID: 34086916
I concur with billprew: http://ss64.com/nt/setx.html
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Expert Comment

by:Ben Personick
ID: 34089338
I agree, Bill Prew's Answer is the correct one.
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Expert Comment

by:Qlemo
ID: 34091030
AFAIK there is still a difference between the GUI and setx: setx will not inform open Windows about the change. Usually that does not matter, since most applications ignore the change anyways until restarted, but sometimes it is important to know that.
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Expert Comment

by:netcmh
ID: 34092615
good point
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Expert Comment

by:Bill Prew
ID: 34092667
Well, there are some subtleties there, right.  For instance, if I set a system variable from the GUI, but had a command shell window open, that command shell doesn't see that new environment variable.

~bp
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Expert Comment

by:Ben Personick
ID: 34092813
Agreed - on both Qlemo and BP's accounts there.. Though, I did think SETX had the same drawback with open windows as via GUI for other command windows, but haven't tested, I believe BP to know his stuff.

  Still, I imagine SETX wins out because he asked "From the Command Line", but as always; the author's true intentions for implementation may allow for the GUI method, or perhaps prefer it.

~Q
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Author Closing Comment

by:OCUBE
ID: 34094679

Thanks
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