Bash true numerical order

Question

How can I order files in a directory by their true numeric order.

file1.txt
file2.txt
file11.txt
...

I think it\'s called : Natural Order

Answer 1

If all filenames are fileSOMENUMBER.txt, try this:

ls -1|sed 's:^[^0-9]*\([0-9]*\).*$:\1:g'|sort -n|sed 's:^\(.*\)$:file\1.txt:g'