replacing contents of files from a bash script

Shell Programming and Scripting
1

I'm writing a shell script and I need to replace the contents of a configuration file based on what is passed to the script...can I replace expressions in a file from a bash shell script?

2

technically speaking, yes.

but then you haven't asked the real question yet. =8*)

3

Yes using sed.

Please post whatever you have and maybe we can help.