Get folder with largest number at the end of the name in Linux

Question

On Linux, I have some folders r1, r2, r3, etc. and I want to get the name of the folder with the largest number at the end. How do I get the name?

Answer 1

printf '%s\n' r[0-9]* | sort --version-sort | tail -n 1

Answer 2

My version of ls has ls -v

$ for i in {1..19}; do touch r$i; done
$ ls | tail -1
r9
$ ls -v | tail -1
r19
$ ls --version
ls (GNU coreutils) 8.10