quick proxy for chrome

https://chrome.google.com/webstore/detail/quick-proxy/gchhimlnjdafdlkojbffdkogjhhkdepf

ssh -D 

proxytype: sock5

centos sudo

http://www.tuxradar.com/answers/635

/etc/sudoers 

$user ALL=(ALL) ALL 

display file with line number

http://www.commandlinefu.com/commands/view/2085/display-a-file-with-line-number

nl file > more 

or less -N,

the former is better since all are in the console windows