combine text and files in a script -

i have following problem: i'm trying write script 2 files (file1.txt , file2.txt) should combined 1 file text passage in between. output should written in file (e.g. output.txt).

the output.txt file should be:

[content of file1.txt]   text passage   [content of file2.txt]   

after research on internet found following , works fine in terminal:

cat file1.txt <(echo "text passage") file2.txt > output.txt   

however, not work in script:

 #!/bin/sh   cat file1.txt <(echo "text passage") file2.txt > output.txt   

if execute script nothing happens (the output.txt isn't written).

why doesn't line work in script , can make work?
thank help!

stephan

you can this:

cat file1.txt > output.txt echo "text message" >> output.txt cat file2.txt >> output.txt 

the >> operator means add end of file, rather overwriting contents.

you can group commands using brackets:

(cat file1.txt echo "text message" cat file2.txt) > output.txt