directory = folder

file = file

filesystem = directory + file

Working Directory = directory you are currently in

Root Directory = directory furthest up the tree (in this case blog)

Some things just to know

~ - home dir

. - hidden file

Commands

$ - This is a prompt to enter a command

-- basic --

$ clear
makes it quiet

$ pwd
prints working directory

$ whoami
prints username

-- list --

$ ls
this lists out all child directories and files

NOTE -a -t -l can be used together, in any order like   $ ls -alt

$ ls -a
shows all files even if hidden

$ ls -l
lists all files in long format + permissions

$ ls -t
orders the files in the order they were last modified

-- cd --
changes directory

~/ = home dir

$ cd nameOfChildDir
moves to child directory

$ cd child/grandchild
moves twice

$ cd ..
move up a directory

$ cd ../sibling
moves across

$ cd ../../../
move back 3 times

-- directory manipulation --

$ mkdir nameOfDir
makes directory with name 'nameOfDir'

$ touch name.txt
creates a file