Creating a large file in Windows / Linux

Was working on a monitoring project, need to create a large file to test notifications.
Here is how we can do that.

Create a file of 500MB in Windows

fsutil file createnew [filename] [bytes]  
fsutil file createnew output.file.dat 53687091200

Create a file of 256M in Linux

dd if=[input] of=[output]  bs=[bytes]  count=[blocks]
dd if=/dev/zero of=output.file.dat  bs=256M  count=1

Create a file of 512MB in Linux

dd if=/dev/zero of=output.file.dat  bs=256M  count=2

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