Bash: generate files from random data

• create 10 x 1KB files

  for i in {1..10}; do dd if=/dev/urandom bs=1k count=1 of=1KB.$i; done
  

• create 10 x 1MB files

  for i in {1..10}; do dd if=/dev/urandom bs=1m count=1 of=1MB.$i; done
  

• create 10 x 1GB files

  for i in {1..10}; do dd if=/dev/urandom bs=1m count=1000 of=1GB.$i; done