Better cdb - original taken from https://stackoverflow.com/questions/7374534/directory-bookmarking-for-bash, modified slightly.

.cdb

#!/bin/bash
function cdb() {
  USAGE="Usage: cdb ([-c|-d] <bookmark>[/dir[/...]]|-l|-h)" ;
  if  [ ! -e ~/.cd_bookmarks ] ; then
    mkdir ~/.cd_bookmarks
  fi

  case $1 in
      # create bookmark
    -c) shift
      if [ ! -f ~/.cd_bookmarks/$1 ] ; then
        echo "`pwd`" > ~/.cd_bookmarks/"$1" ;
      else
        echo "Try again! Looks like there is already a bookmark '$1'"
      fi
      ;;
      # delete bookmark
    -d) shift
      if [ -f ~/.cd_bookmarks/$1 ] ; then
        rm ~/.cd_bookmarks/"$1" ;
      else
        echo "Oops, forgot to specify the bookmark" ;
      fi
      ;;
      # list bookmarks
    -l) shift
      for bookmark in ~/.cd_bookmarks/*; do
        echo "$(basename $bookmark): $(< $bookmark)"
      done
      ;;
    -h) shift
      echo $USAGE
      ;;
      # goto bookmark
    *)
      if [ "$1" == "-g" ] ; then
        shift
      fi
      #if [ -f ~/.cd_bookmarks/$1 ] ; then
        dirarr=(${1//"/"/ })
        cd $(< ~/.cd_bookmarks/"${dirarr[0]}")
        for dir in "${dirarr[@]:1}"; do
          cd $dir
        done
      #else
       # echo "Mmm...looks like your bookmark has spontaneously combusted. What I mean to say is that your bookmark does not exist." ;
      #fi
      ;;
  esac
}

README.md

Installation

Download .cdb, put it into $HOME, put

if [ -f ~/.cdb ]; then . ~/.cdb; fi 

into ~/.bashrc, you're good!

Usage

cdb ([-c|-d] <bookmark>|<bookmark>[/dir[/...]]|-l|-h)

c: create
d: delete
just bookmark: go to that bookmark
l: list
h: help