Read from file > process > output to file - Shell Programming and Scripting

matrixmadhan · #4 (**permalink**) 10-06-2008

Quote:

Originally Posted by danmero

This is a very "first time question"

The basic concept should be:

Code:

while read col1 col2
do 
  echo $col1 >> output.file
  echo $col2 >> output.file
done < data.file

For solutions you can use the search tab on this forum... or Google for tutorials for your shell.

this is much better, no need to open and close files multiple times

Code:

while read col1 col2
do 
  echo $col1 
  echo $col2 
done < data.file >> output.file