Create random data files | Generate a token

random-files.sh

# 5 - number of files
# bs * count = size of file
# bs = sets the blocksize
# count = copies only this number of blocks
for i in {1..2}; do dd if=/dev/urandom bs=4096 count=500 of=file$i; done

# generate a token, simple way:
dd if=/dev/urandom  count=1 bs=128 | sha512sum

# further reading
# https://linoxide.com/commands-wipe-disk-linux/

# 1MiB: 
for i in {1..2}; do dd if=/dev/urandom bs=4096 count=256 of=file$i; done

# 500 files for 1 GiB, & measure time
time for i in {1..500}; do dd if=/dev/urandom bs=4096 count=262144 of=file$i; done