Ubuntu: Navigating folders and directory commands in Terminal

Initial line in Terminal. Note that ~ represents the Home Folder.

username@machinename:~$ 

To know your current working directory:

username@machinename:~$ pwd

home/rootfolder 

To know the list of items inside the path (or can also use command dir):

username@machinename:~$ ls

Folder1  Folder2  Folder3

To change directory:

username@machinename:~$ cd Folder1 

username@machinename:~/Folder1$

To return back to Home Folder:

username@machinename:~/Folder1$ cd ~ 

username@machinename:~$

To go to root filesystem:

username@machinename:~$ cd /

username@machinename:/$ ls 

bin    dev   initrd.img  media  root     srv  usr

boot   etc   lib         mnt    sbin     sys  var

cdrom  home  lost+found  proc   selinux  tmp  vmlinuz

To go up one level (notice there is a space, unlike in DOS where it is "cd.."):

username@machinename:/media$ cd ..

username@machinename:/$

To go up one level and to a specific folder name in that directory:

username@machinename:/media$ cd ../boot

 username@machinename:/boot$