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> <size_in_bytes>
fsutil file createnew output.file.dat 53687091200

Create a file of 256M in Linux

dd if=<input_file> of=<output_file>  bs=<bytes_at_a_time>  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