Tip #4
20/8/2019

  • Tip

    How to detect which process is using a particular TCP port

  • The following are ways that you can use to find out which process is using a particular
    TCP port depending on your platform.
    • Windows 
      • C:\Program Files\IBM\SQLLIB\BIN>netstat -ano | find "50000"
  TCP    0.0.0.0:50000          0.0.0.0:0           LISTENING       3332
  TCP    [::]:50000             [::]:0              LISTENING       3332
    • Linux
      • As root user, issue "netstat -anp" or fuser: 
      yaba:/opt/ibm/db2/V9.7/instance # netstat -anp|grep 60015
tcp  0      0 0.0.0.0:60015  0.0.0.0:*   LISTEN  5948/db2sysc 0

db2v10@yaba:/home/db2v10> fuser 60015/tcp
60015/tcp:            5948
    • AIX
      • As root user, use lsof: 
      # /usr/sbin/lsof -i :61001
      If you don't have lsof installed: 
      # cat port.sh
if [[ $# -ne 1 ]]; then
echo $0 PORTNUM
exit 1
fi
TCPCB=`netstat -Aan|grep $1|awk '{print $1}'`
echo "sockinfo $TCPCB tcpcb"|kdb

# ./port.sh 60888
...
              SLOT NAME     STATE      PID    PPID          ADSPACE  CL #THS

pvproc+090800  578*db2sysc  ACTIVE 242006E 26C007A 00000009658D7510   0 000E

# echo "hcal 242006E"|kdb|grep -i value
Value hexa: 0242006E          Value decimal: 37879918