Note: Text following a pound sign # are comments
1) Navigate to your home directory
2) Make a new folder called challenge01
3) Navigate into that new folder
$ cd # cd without any arguments navigates to the home directory
$ pwd
/home1/03439/wallen
$ mkdir challenge01
$ cd challenge01
4) Make 5 sub folders called a, b, c, d, e
$ mkdir a
$ mkdir b
$ mkdir c d e # make multiple folders simultaneously by providing names seperated by spaces
5) Wihin each of those sub folders, make 5 sub folders called 1, 2, 3, 4, 5
$ cd a
$ mkdir 1 2 3 4 5
$ cd .. # try to keep in mind your present location as you move through the file system
$ cd b
$ mkdir 1 2 3 4 5
$ cd ../c # use relative paths to navigate up one folder, then into the 'c' folder in one step
$ mkdir 1 2 3 4 5 # use the <UpArrow> to cycle through command history
$ cd ../d
$ mkdir 1 2 3 4 5
$ cd ../e
$ mkdir 1 2 3 4 5
6) Navigate back to your home directory and print a hierarchical view of the challenge01 folder
$ cd ..
$ pwd
/home1/03439/wallen/challenge01
$ cd ..
$ pwd
/home1/03439/wallen
$ tree challenge01
challenge01
|-- a
| |-- 1
| |-- 2
| |-- 3
| |-- 4
| `-- 5
|-- b
| |-- 1
| |-- 2
| |-- 3
| |-- 4
| `-- 5
|-- c
| |-- 1
| |-- 2
| |-- 3
| |-- 4
| `-- 5
|-- d
| |-- 1
| |-- 2
| |-- 3
| |-- 4
| `-- 5
`-- e
|-- 1
|-- 2
|-- 3
|-- 4
`-- 5
7) Advanced Linux users: can you do this on one line?
cd && mkdir challenge01 && cd challenge01; for VAR in a b c d e; do mkdir $VAR && cd $VAR && mkdir 1 2 3 4 5 && cd ../; done; cd && tree challenge01