I have a shell script which 

1. shuffles a large text file (6 million rows and 6 columns)
2. sorts the file based the first column
3. outputs 1000 files

So the pseudocode looks like this 

```
file1.sh 

#!/bin/bash
for i in $(seq 1 1000)
do

  Generating random numbers here , sorting  and outputting to file$i.txt  

done

```

Is there a way to run this shell script in `parallel` to make full use of multi-core CPUs?

At the moment, .`/file1.sh` executes in sequence 1 to 1000 runs and it is very slow.

Thanks for your help.