Linux Shell Scripting Cookbook - Third Edition

Redirecting from a text block enclosed within a script

Text can be redirected from a script into a file. To add a warning to the top of an automatically generated file, use the following code:

#!/bin/bash 
cat<<EOF>log.txt 
This is a generated file. Do not edit. Changes will be overwritten. 
EOF

The lines that appear between cat <<EOF >log.txt and the next EOF line will appear as the stdin data. The contents of log.txt are shown here:

$ cat log.txt 
This is a generated file. Do not edit. Changes will be overwritten.