It deletes the current directory

It moves you to the directory you where previously in

It moves to your  home folder 

find . -type html

find . -name *.html

find . -name\*.html -print

find *.html

search "ABC" file1

find  "ABC" file1

grep  "ABC" file1

grep –c "ABC" file1

$$

::

$#

done

;;

/usr/bin/[

/usr/bin/[[

/usr/bin/test

the built-in [ command

Nothing will be echoed  on the screen

/var/www/html/website.com/

/html/website.com/html/

/website.com/html/

$$ // pid if the current shell

$# //number of positional parameters

$@// array-like construct of all positional parameters

$0

an action that is taken for any input, even if matches a specified conditions

a case only for what happens when the asterisk character is passed intro the script

the action of all of the other cases combined together

a case that matches any value? providing a default option if nothing else catches that value

This old man came  rolling

This old came 

This old man came man

This old rolling came rolling