What processes are using which ports on unix

Question

I need to find out what ports are attached to which processes on a Unix machine  HP Itanium   Unfortunately  lsof is not installed and I have no way of installing it    Does anyone know an alternative method  A fairly lengthy Googling session hasn t turned up anything

User · Answer

Given  almost  everything on unix is a file  and lsof lists open files     Linux   netstat -putan or lsof   grep TCP  OSX   lsof   grep TCP  Other Unixen   lsof way

User · Answer

Try pfiles PID to show all open files for a process

User · Answer

Assuming this is HP-UX  What about the Ptools - do you have those installed  If so you can use  pfiles  to find the ports in use by the application       pfiles prints information about all open file descriptors of a process    If file descriptor corresponds to a file  then pfiles prints the fstat 2     and fcntl 2  information       If the file descriptor corresponds to a socket  then pfiles prints socket    related info  such as the socket type  socket family  and protocol family       In the case of AF INET and AF INET6 family of sockets  information about    the peer host is also printed    for f in   ps -ex   awk   print  1     do echo  f  pfiles  f   grep PORTNUM  done  switch PORTNUM for the port number      may be child pid  but gets you close enough to identify the problem app

User · Answer

If you want to know all listening ports along with its details  local address  foreign address and state as well as Process ID  PID   You can use following command for it in linux    netstat -tulpn

User · Answer

Which process uses port in unix   1  netstat -Aan   grep port     root  netstat -Aan   grep 3872      output  f1000e000bb5c3b8 tcp        0      0    3872                     LISTEN   2  rmsock f1000e000bb5c3b8 tcpcb     output  The socket 0xf1000e000bb5c008 is being held by proccess 13959354  java     3  ps -ef   grep 13959354

User · Answer

netstat -l  assuming it comes with that version of UNIX

User · Answer

I use this command   netstat -tulpn   grep LISTEN   You can have a clean output that shows process id and ports that s listening on

User · Answer

netstat -ln   awk     tcp udp     split  4  a        print  1  a 2      sort -u   gives you the active tcp udp ports  Then you can use the ports with fuser -n tcp or fuser -n udp  as root  and supposing that fuser is GNU fuser or has similar options   If you need more help  let me know

User · Answer

netstat -pln   EDIT  linux only  on other UNIXes netstat may not support all these options

[hp-ux] What processes are using which ports on unix?

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