On Thu, Dec 20 at 08:59, Keir Whitlock wrote:
> Hi, A quick one for you, echo "hi" >> /tmp/file will append hi to the
> end of file, but how do I prepend it to the top of the file?
Since the filesystesm don't support a prepend function unlike append
you'll have to resort to some application support.
You could echo Hi to a new file, concatinate the old file onto it and
move the result back. I prefer to edit in place as there is a better
chance of preserving links/permissions etc, depending on your editor.
I'd use.
ed - /tmp/file <<EOF
1i
hi
.
w
q
EOF
But I'd probably think carefully about whether prepending to a file was
actually the real requirement or whether I'd got something not quite
right at a higher level.
--
Bob Dunlop
