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How do I use the set /a command on the Wine version of CMD?

This doesn't work for me on Ubuntu 12.04 LTS:

set /a option=1+1
echo %option%

On a Windows computer it would output 2 on the screen but in the Wine version it just outputs whether Echo is on or not.

How do I fix this?

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Can someone like please answer the question –  Shubshub Jan 19 '13 at 3:40

1 Answer 1

"set /a" was not implemented in cmd until WINE 1.5.20

Depending on what you're trying to accomplish you may be able to work around this by doing the math with a bash script that outputs to a text file, then assigning the contents of the file to a variable from inside WINE like so:

set /p option=<file.txt
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