I find an interesting thing about linux bash.
After I typed
That's what should have happened.
When you did
cd //, the system changed your directory to
/. So pwd will tell you (correctly) that you are in
//. (Refer to the answer linked in the comments to understand why multiple slashes are the same as a single slash).
If you do an
ls after your
cd // command you'll see a lot of folders that are mounted on
Nothing 'happened to the bash'.
If you do a
cd , it will take you back to your more famliar