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

Actually, if you don't supply an argument to the "read" call, read will set a default variable called $REPLY which will preserve whitespace. So you can just do this:

$ cat test.file | while read; do echo "$REPLY"; done