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

For this particular list of files, sort numerically starting at the fifth character of the first field.

$ ls file*|sort -k1.5n
file1
file2
file11
file12