Find the PID of a process that uses a port on Windows

Question

My service crash on startup with the classic   java rmi server ExportException  Listen failed on port  9999   How can I find the process for killing it

User · Answer

This helps to find PID using port number    lsof -i tcp port number

User · Answer

Command   netstat -aon   findstr 4723   Output   TCP    0 0 0 0 4723           0 0 0 0 0                LISTENING       10396   Now cut the process ID   10396   using the for command in Windows   Command   for  f  tokens 5   a in   netstat -aon    findstr 4723   do  echo   nxa   Output   10396  If you want to cut the 4th number of the value means  LISTENING  then command in Windows   Command   for  f  tokens 4   a in   netstat -aon    findstr 4723   do  echo   nxa   Output   LISTENING

User · Answer

PowerShell  Core-compatible  one-liner to ease copypaste scenarios   netstat -aon   Select-String 8080   ForEach-Object      -replace   s            ConvertFrom-Csv -Header    Empty    Protocol    AddressLocal    AddressForeign    State    PID     ForEach-Object    portProcess   Get-Process   Where-Object Id -eq    PID       Add-Member -NotePropertyName  ProcessName  -NotePropertyValue  portProcess ProcessName  Write-Output        Sort-Object ProcessName  State  Protocol  AddressLocal  AddressForeign   Select-Object  ProcessName  State  Protocol  AddressLocal  AddressForeign   Format-Table   Output   ProcessName State     Protocol AddressLocal AddressForeign ----------- -----     -------- ------------ -------------- System      LISTENING TCP           8080         0 System      LISTENING TCP      0 0 0 0 8080 0 0 0 0 0   Same code  developer-friendly    Port   8080    Get PID s listening to  Port  as PSObject  PidsAtPortString   netstat -aon       Select-String  Port  PidsAtPort    PidsAtPortString       ForEach-Object              -replace   s                    ConvertFrom-Csv -Header    Empty    Protocol    AddressLocal    AddressForeign    State    PID      Enrich port s list with ProcessName data  ProcessesAtPort    PidsAtPort       ForEach-Object          portProcess   Get-Process           Where-Object Id -eq    PID             Add-Member -NotePropertyName  ProcessName  -NotePropertyValue  portProcess ProcessName        Write-Output            Show output  ProcessesAtPort       Sort-Object    ProcessName  State  Protocol  AddressLocal  AddressForeign       Select-Object  ProcessName  State  Protocol  AddressLocal  AddressForeign       Format-Table

User · Answer

If you want to do this programmatically you can use some of the options given to you as follows in a PowerShell script    processPID        netstat -aon   findstr  9999   0  -split   s    -1  taskkill  f  pid  processPID   However  be aware that the more accurate you can be the more precise your PID result will be  If you know which host the port is supposed to be on you can narrow it down a lot  netstat -aon   findstr  0 0 0 0 9999  will only return one application and most llikely the correct one  Only searching on the port number may cause you to return processes that only happens to have 9999 in it  like this   TCP    0 0 0 0 9999                        0 0 0 0 0       LISTENING       15776 UDP     fe80  81ad 9999 d955 c4ca 2  1900                                  12331   The most likely candidate usually ends up first  but if the process has ended before you run your script you may end up with PID 12331 instead and killing the wrong process

User · Answer

Just open a command shell and type  saying your port is 123456    netstat -a -n -o   find  123456    You will see everything you need   The headers are    Proto  Local Address          Foreign Address        State           PID  TCP    0 0 0 0 37             0 0 0 0 0              LISTENING       1111

User · Answer

Find the PID of a process that uses a port on Windows  e g  port   9999    netstat -aon   find  9999    -a Displays all connections and listening ports   -o Displays the owning process ID associated with each connection   -n Displays addresses and port numbers in numerical form   Output   TCP    0 0 0 0 9999       0 0 0 0 0       LISTENING       15776   Then kill the process by PID  taskkill  F  PID 15776    F - Specifies to forcefully terminate the process es    Note  You may need an extra permission  run from administrator  to kill some certain processes

User · Answer

After some fiddling with a script I came to this action  Copy and save it in a  bat file   FOR  F  usebackq tokens 5    i IN   netstat -aon    find  3306    DO taskkill  F  PID   i   Change  find  3306   in the port number which needs to be free  Then run the file as administrator  It will kill all the processes running on this port

[port] Find the PID of a process that uses a port on Windows

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