def os_upgrade():
 print green(('%s: Updating OS' % env.host))
 run('apt-get update', pty=True)
 run('apt-get upgrade -y', pty=True)

def os_upgrade ( ) : print green ( ( '%s: Updating OS' % env . host ) ) run ( 'apt-get update' , pty = True ) run ( 'apt-get upgrade -y' , pty = True )
update os .