split and gzip bash script

split_and_gzip.sh

#!/bin/bash -e

# usage: bash ./split_and_gzip.sh file.txt

FILE=$1
LINES_PER_FILE=10000000 #10m

$(split -l $LINES_PER_FILE -d $FILE ${FILE}.)

FILES=${FILE}.*
for f in $FILES
do
  echo "GZipping file $f ..."
  number=$(echo $f | grep -oE "[[:digit:]]{1,}$") 
  filename="${FILE}.gz.${number}"
  $(gzip $f -c > $filename)
  $(rm $f)
done