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10-08-2009
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No process ID for listening ports
How can I have ports that are listening without processes being associated with them?
Code:
root@ldv002 # netstat -ltnup Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:5600 0.0.0.0:* LISTEN 1949/esmd tcp 0 0 0.0.0.0:6305 0.0.0.0:* LISTEN 3651/xinetd tcp 0 0 127.0.0.1:199 0.0.0.0:* LISTEN 5408/snmpd tcp 0 0 0.0.0.0:34540 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:1006 0.0.0.0:* LISTEN 5488/rpc.statd tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 3087/portmap tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 3669/vsftpd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 3694/sendmail: acce tcp 0 0 :::22 :::* LISTEN 3634/sshd udp 0 0 0.0.0.0:514 0.0.0.0:* 3044/syslogd udp 0 0 0.0.0.0:161 0.0.0.0:* 5408/snmpd udp 0 0 0.0.0.0:49471 0.0.0.0:* 5408/snmpd udp 0 0 0.0.0.0:68 0.0.0.0:* 2892/dhclient udp 0 0 0.0.0.0:59742 0.0.0.0:* - udp 0 0 0.0.0.0:1000 0.0.0.0:* 5488/rpc.statd udp 0 0 0.0.0.0:1003 0.0.0.0:* 5488/rpc.statd udp 0 0 0.0.0.0:111 0.0.0.0:* 3087/portmap Code:
root@ldv002 # lsof -i tcp:5600 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME esmd 1949 root 4u IPv4 338848 TCP *:esmmanager (LISTEN) [/root] root@ldv002 # lsof -i tcp:34540 [/root] root@ldv002 # lsof -i tcp:59742 [/root] |
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10-09-2009
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Code:
$ man netstat
...
..
Active Internet connections (TCP, UDP, raw)
...
...
PID/Program name
Slash-separated pair of the process id (PID) and process name of the process that owns the socket.
--program causes this column to be included. You will also need superuser privileges to see this
information on sockets you donāt own. This identification information is not yet available
for IPX sockets.
.....
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