It deletes the current directory

It moves to your  home folder 

It moves you to the directory you where previously in

find  "ABC" file1

grep  "ABC" file1

grep –c "ABC" file1

search "ABC" file1

done

;;

::

$$

$#

find . -name\*.html -print

find . -name *.html

find *.html

find . -type html

/usr/bin/[[

/usr/bin/test

/usr/bin/[

the built-in [ command

Nothing will be echoed  on the screen

/html/website.com/html/

/website.com/html/

/var/www/html/website.com/

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

$$ // pid if the current shell

$0

$# //number of positional parameters

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

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

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

the action of all of the other cases combined together

This old man came man

This old man came  rolling

This old rolling came rolling 

This old came