I am trying to install some applications, on my linux OS and all the instructions are tell me that ill have to navigate to the directories and type the link that they provide, but i try typing 'dir' which shows me the directories but to access a particular one i can't remember how??? can anyone help me A.S.A.P

Use the 'cd' command.
cd - Change Directory.
Usage:
$ cd directory_name

Use 'ls' for listing files and directories instead of 'dir'.

u can use the following command

ls -lr

for viewing the sub-directory from the parent directory
-l = stands for long list and
-r = stands for recurring directories(sub-directories)