I need to copy a file, so that a destination file has some specific string on beginning of each line, and it needs to be a bash one liner. So no script and loops, just bol.bol - bash one linerI personally need this done with command that uses grep program. I appreciate if you can solve it any way possible, I just don't have that much use of it, if not with grep.EDIT:  Okay, can't be done with grep, sed is okay. Sorry.
How to copy the file while making changes to every line [bol]?
text processing;command line;grep
$ sed 's/^/specific string/' input >outputYou said you needed to use grep, okay...$ sed 's/^/specific string/' input | grep . >output