How Can I Insert Text After a Specific String in a Bash Script?

You're right; 'sort' isn't what you need since it just rearranges lines. What you're trying to do can usually be handled by 'sed' or 'awk'. If you're working with multiple lines, 'awk' might be the better option.

Here's a quick example of how you might do this in bash:

```bash
haystack='prefix stuck suffix'
needle='stuck'
new_text='in the middle with you'
if [[ ${haystack} =~ (.*${needle})(.*) ]]; then
echo ${BASH_REMATCH[1]} ${new_text} ${BASH_REMATCH[2]}
fi
```

This could give you a good starting point!

'sed' should do the job you're looking for. It's great for inserting text after certain strings in a file or input stream.

If you need to work on just one line, you can easily do this in a text editor or use a simple 'sed' command to get the insertion done. It can handle it well!