command to close tcp socket
 

After the server is stopped, the tcp port 1864 is still listening (a bug in the server), is there an unix command to close the socket.

# netstat -na
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 172.20.11.242:1864 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 172.20.11.242:22 172.20.11.211:32877 ESTABLISHED
tcp 0 0 172.20.11.242:22 172.20.10.119:32789 ESTABLISHED
tcp 0 0 172.20.11.242:22 172.20.11.211:32878 ESTABLISHED
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ACC ] STREAM LISTENING 902 /var/run/acpid.socket
unix 10 [ ] DGRAM 741 /dev/log
unix 2 [ ] DGRAM 8305323
unix 2 [ ] DGRAM 1500912
unix 2 [ ] DGRAM 705953
unix 2 [ ] DGRAM 11894
unix 2 [ ] DGRAM 1172
unix 2 [ ] DGRAM 999
unix 2 [ ] DGRAM 946
unix 2 [ ] DGRAM 753
unix 2 [ ] STREAM CONNECTED 433

if the server is really stopped, how can the port still be listening? Correct me if I'm wrong, but I didn't think a program could still be bound to a port after it is killed.