I typed cd - in terminal by mistake today, and I got an error saying:
bash: cd: OLDPWD not set
And unfortunately, man cd doesn't exist.
No manual entry for cd
What does it actually do?
cd - switches between the old and new present working directories.
avinash@avinash:~$ cd -
bash: cd: OLDPWD not set
avinash@avinash:~$ cd ~/Desktop
avinash@avinash:~/Desktop$ pwd
/home/avinash/Desktop
avinash@avinash:~/Desktop$ cd -
/home/avinash
avinash@avinash:~$
See also,
avinash@avinash:~$ echo $OLDPWD
avinash@avinash:~$ cd ~/Desktop
avinash@avinash:~/Desktop$ echo $OLDPWD
/home/avinash
avinash@avinash:~/Desktop$ cd d
avinash@avinash:~/Desktop/d$ echo $OLDPWD
/home/avinash/Desktop
avinash@avinash:~/Desktop/d$
The $OLDPWD variable stores the path of the previous present working directory.
