Setup

1. Copy this file to somewhere (e.g. ~/Better_cd.sh).
2. Add the following line to your .bashrc:

   source ~/Better_cd.sh

3. Resource the .bashrc by executing the command:

   source ~/.bashrc

Usage

1. cd now also records pwd to the .dir_history
2. cdl list the directories you have been to.
3. cdl 20 list 20 directories you have been to.
4. cdd go to the last directory
5. cdd 4 go to the fourth directory listed by cdl