dummy file 만들기

3M File
dd bs=1024K if=/dev/zero of=monitor3.file count=3

10M
dd bs=1024K if=/dev/zero of=monitor10.file count=10

7G

dd if=/dev/zero of=update-7G.zip bs=1M count=7168

13G

dd if=/dev/zero of=update-13G.zip bs=1M count=13312