Replace delimited block of text in file with the contents of another file

Question

I need to write a simple script to replace a block of text in a configuration file with the contents of another file.

Let\'s assume with have the following simplifie

Answer 1

Give this a try:

sed -i -ne '// {p; r realm.xml' -e ':a; n; // {p; b}; ba}; p' server.xml