list textfile

[Paul Howarth]

roland brouwers wrote:
> Hello everybody,
> 
> Could someone tell me how I can 
> List all filenames in a directory, sorted by time 
> And then
> Copying each file in this order to one file line by line, each line
> preceded by the first character of the filename

That's a one-liner:

$ awk '{ print substr(FILENAME, 1, 1) $0 }' $(ls -rt) > /path/to/output

If you actually want to see the list of files, as suggested by the way 
you worded the request, use:

$ ls -1rt

Paul.