Convert a file to all uppercase using sed

[aeamacman]

Hi there,

I have a file I that I want to change all text within to uppercase. I would like to learn this using sed.

I was thinking

sed 's/[a-z]/[A-Z]/g' might be my answer, but it doesn't seem to work. Any ideas guys?

[Snowhog]

Re: Convert a file to all uppercase using sed

tr '[:lower:]' '[:upper:]' < input.txt > output.txt

Works like a champ. 8)

Reference: man tr

[Rog131]

Re: Convert a file to all uppercase using sed

...and with the sed > Sed - An Introduction and Tutorial

Transform with y

If you wanted to change a word from lower case to upper case, you could write 26 character substitutions, converting "a" to "A," etc. Sed has a command that operates like the tr program. It is called the "y" command. For instance, to change the letters "a" through "f" into their upper case form, use:
sed 'y/abcdef/ABCDEF/' file

I could have used an example that converted all 26 letters into upper case

and even more > UPPERCASE to lowercase command?