Use Bash to read line by line and keep space

Question

When I use \"cat test.file\", it will show

1
 2
  3
   4

When I use the Bash file,

cat test.file |
while read data
do
    e         


        

Answer 1

Alternatively, use a good file parsing tool, like AWK:

awk '{
  # Do your stuff
  print 
}' file