Convert first letter of given file to lower case

Question

I want to convert the 1st letter of each line to lower case up to the end of the file. How can I do this using shell scripting?

I tried this:

plat=`echo $plat |cut -c1 |tr [:upper:] [:lower:]``echo $plat |cut -c2-`

but this converts only the first character to lower case.

My file looks like this:

Apple
Orange
Grape

Expected result:

apple
orange
grape

Answer 1

You can do that with sed:

sed -e 's/./\L&/' Shell.txt

(Probably safer to do

sed -e 's/^./\L&\E/' Shell.txt

if you ever want to extend this.)

Answer 2

Try:

plat=`echo $plat |cut -c1 |tr '[:upper:]' '[:lower:]'``echo $plat |cut -c2-`