Arduino Yun listen to udp

i want to use netcat to listen to a udp package comming from a osc command
is netcat the way to go ?

I guess you want to use that UDP message on the arduino side. If you can grab its output and use it, it's a way to go. the other way is using python and Bridge.put. Best would be to use the mailbox API but the python bridgeclient still misses support for it