title: how to you toggle on and off a web proxy in os x from the command line
body: <p>In OS X, you turn on and off a web proxy from System Preferences > Network > Proxies, by checking Web Proxy (HTTP) and designating the Web Proxy Server etc. and by clicking OK and then "Apply". This is way too many steps. Is there a way to do this all from the command line and a shell script?</p>