nslookup address
ping address
dig ttldemo.gokisa.com

service httpd status

ssh -i key.pem user@0.0.0.0
scp -i key.pem user@0.0.0.0:/var/www/html.zip ~/Desktop/wordpress

git rm -r --cached some-directory
git commit -m 'Remove the now ignored directory "some-directory"'
git push origin master

CREATE USER 'cake'@'localhost' IDENTIFIED BY 'cake';
GRANT ALL PRIVILEGES ON * . * TO 'cake'@'localhost';


mysql -u username -p database_name < file.sql

:q quit
:w write
:set number put numbers
i insert mode
esc command mode
dd command mode delete line
3dd delete 3 lines
u undo last action
ctrl r redo
/ search first match and enter
n next 
N search backwards
i insert mode
:%s/text/textreplace/g g-for all c-with permission  search and replace in command mode