large_file_read_and_split.sh

# Create a File
seq 1 100000000 > my_file.txt

# Check File Size
welcome@welcomes-MacBook-Pro temp_data % ls -hl                       
total 2326664
-rw-r--r--  1 welcome  staff   1.1G Mar  3 20:27 my_file.txt
-rw-r--r--  1 welcome  staff    71B Mar  3 20:22 read_file.sh
welcome@welcomes-MacBook-Pro temp_data %


# Read a File 
input=my_file.txt
while read -r line
do
  echo "$line"
done < "$input"