mc36@p4emu:~$ uname -a ; sudo ./a.out 
Linux p4emu 6.12.48+deb13-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.48-1 (2025-09-20) x86_64 GNU/Linux
opening interface veth0
serving others
mc36@p4emu:~$ sudo reboot 

