panel 1: ctrl + r

search your history!
I use this constantly to rerun commands

panel 2: magical braces

expands to  
```$ convert file.jpg  file.png```  

`{1..5}` expands to 1 2 3 4 5   
(for i in {1..100}...)

### panel 3: !!
expands to the last command run    
`$ sudo !!`

### panel 4: 
commands that start with a space don't go in your history. good if there's a password

### panel 5: loops

for i in *.png
do
convert $i $i.jpg done ```

person: for loops: easy & useful!

panel 6: $ ( )

gives the output of a command

$touch file- $ (date -1)
create a file named file-2018-05-25

panel 7: more keyboard shortcuts

ctrl + a beginning of line
ctrl + e end of line
ctrl + l clear the screen

& lots more emacs shortcuts too!