chunk-file.sh

#!/bin/bash

# Total number of lines in file
filelines=$(wc -l < $2)
# Number of chunks in the array
split=$1
# Loop counter
counter=0
# Figures out skip based on lines and split
chunk=$(($filelines / $split))

end=$chunk
start=0
chunkList=[]

while [  $counter -lt $split ]; do
  sedStart=$(($start + 1))
  sedEnd="$(($end + 1))p"

  # Chunk into array
  chunkList[$counter]="$(sed -n $sedStart,$sedEnd < $2)"

  start=$(($end + 1))
  end=$(($end + $chunk + 1))
  let counter++
done

echo ${chunkList[@]}