Tool for adding a piece of text to a configuration file?
I'm making a Kerberized version of the amanda package.
In the postinst and postrm scripts I need to add/remove a piece of
text to two configuration files.
I'd like to add a section like
# BEGIN amanda
# END amanda
and create the file if it doesn't exist. The comments will make
removing the section easier.
This seems to be a common thing to want to do, so I expect that a tool
for this already exists.
Can anyone give me a hint?