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yes "This is a 50 GB test file line." | head -c 50G > testfile_50GB.txt But that is impractical and rarely useful for technical testing.
$size = 50GB $file = "C:\testfile_50GB.bin" $stream = [System.IO.File]::OpenWrite($file) $stream.SetLength($size) $stream.Close() Using dd (creates a 50 GB file of zero bytes): 50 gb test file
Creating a full "50 GB test file" is not about writing text content (that would be billions of pages), but about for testing purposes (e.g., network speed, storage limits, or application behavior). yes "This is a 50 GB test file line
with open(filename, "wb") as f: f.seek(size - 1) f.write(b"\0") print(f"Created filename of size os.path.getsize(filename) bytes") This writes a sparse file instantly. For fully populated data, write in chunks. #include <stdio.h> #include <stdlib.h> int main() FILE *f = fopen("testfile_50GB.bin", "wb"); fseek(f, 53687091200L - 1, SEEK_SET); fputc(0, f); fclose(f); return 0; For fully populated data, write in chunks