As most system administrators, I use the vi text editor a ton in my job. So I am familiar with all the common commands you can run. Today I was wondering if it was possible to change lower case to upper case letters and the opposite, from upper case to lower case letters.
Here’s how you do it:
change all lower case to upper case (CAPITAL LETTERS):
change all upper case to lower case (small letters):
Of course, the % is the entire document, the s///g is search and replace the entire line, ^.*$ matches everything, and the important part L& converts to lower case and U& converts to upper case.