root@user-Virtual-Machine:~# sudo lsof -i :53
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
systemd-r 481 systemd-resolve 13u IPv4 201 0t0 UDP 127.0.0.53:domain
systemd-r 481 systemd-resolve 14u IPv4 202 0t0 TCP 127.0.0.53:domain (LISTEN)
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