Un exemple :
norbs@norbux:/tmp$ bash --version
GNU bash, version 2.05b.0(1)-release (i386-pc-linux-gnu)
Copyright (C) 2002 Free Software Foundation, Inc.
norbs@norbux:/tmp$ mkdir "a b" [------ 2 espaces]
norbs@norbux:/tmp$ cd a\ \ b/
norbs@norbux:/tmp/a b$ pwd
/tmp/a b [-------- 2 espaces (ok)]
norbs@norbux:/tmp/a b$ echo `pwd`
/tmp/a b [------------ 1 (…)