How to create hundred thousand (100,000) files with extension of “.jpg”, ‘.c’, ‘.sh’?

Question

How to create hundred thousand (100,000) files in a directory with extension of each .jpg, .c, .sh?

The size of each file will be 5kb and each extension will have 33,333 files.

Answer 1

There are many ways to do this:

• Using head with a simple for construct:

  for ext in jpg c sh; do head -c 5K /dev/zero >{1..33333}."$ext"; done
  

  Similarly tail -c 5K would work also.

• Using dd:

  for ext in jpg c sh; do dd if=/dev/zero bs=1K count=5 >{1..33333}."$ext"; done
  

• Using truncate (this would create sparse files):

  for ext in jpg c sh; do truncate -s 5K {1..33333}."$ext"; done
  

All of the above will create files with extensions .sh, .c and .jpg. Each file will be of 5KB and each extension will have 33,333 files.

Answer 2

This would help :

mkdir my100000files
cd my100000files/
touch aa

Now write anything in aa to make it 1KB to 10KB

for FILE in `seq 00000 33333`; do cp aa $FILE.c; done

Do the same for .sh and jpg