linux - UNIX sort ignores whitespaces

Question

Given a file txt:

ab
a c
a a

When calling sort txt, I obtain:

a a
ab
a c

In other words, it is not proper sorting, it kind of deletes/ignores the whitespaces! I expected this to be the behavior of sort -i but it happens with or without the -i flag.

I would like to obtain "correct" sorting:

a a
a c
ab

How should I do that?

Answer 1

Solved by:

export LC_ALL=C

From the sort() documentation:

WARNING: The locale specified by the environment affects sort order. Set LC_ALL=C to get the traditional sort order that uses native byte values.

(works for ASCII at least, no idea for UTF8)