hello, everybody. Wish you a good day! I have compiled my test program with libipq. But when I try to execute it with netqueue command, I get some troubles. ----There exists no such command. Why? Then how to execute my program? Another question: I think it's something like writer and reader problem since kernel tries to put packets into user space and my program tries to read them. Is it necessary for user application to do some work for synchronization? If not, why? Thanks for your suggestions!