I want to change the first character of each line to upper case.
The brute force technique uses cut
to make two work files, tr
one of them to upper case, and paste
to arrive at the desired result. Googling in search of a more direct method I came upon this one:
sed 's/\([a-z]\)\([a-zA-Z0-9]*\)/\u\1\2/g' $InFile
It works but I don't understand it. Attempting to simplify this one-liner I tried this:
sed 's/\([a-z]\)\(.*\)/\u\1\2/' $InFile
This also works but why?!? The magic may lie in the \u
but what does that mean?
Daniel B. Martin