How to use external command cd in bash?

Question

I'm trying to use external cd (/usr/bin/cd) to jump to parent directory /usr/bin/cd .. but it doesn't work (no error message, current directory remains as was). I know this is a builtin bash command and this whole operation is pointless but it's part of school assignment, any ideas how to achieve it?

I believe all the viable uses of external cd are listed in the answers to this question: What is the point of the cd external command?. They are extremely specific. — Michael Homer, Mar 24 '20 at 01:57
Is the point of the exercise to see how many students have read all of the way through the description of the cd utility in the Single UNIX Specification and are prepared to come back and challenge the premise of the exercise, doco in hand? (-: — JdeBP, Mar 24 '20 at 08:38

score -2 · Answer 1 · answered Mar 30 '20 at 18:07

-2

I found the answer myself. Proper usage is:

. /usr/bin/cd ..

answered Mar 30 '20 at 18:07

Janek

1

2

that only works if /usr/bin/cd is implemented as a shell script. It doesn't have to be, though that would be a trivial implementation. – ilkkachu Mar 30 '20 at 20:49

How to use external command cd in bash?

1 Answers1