{"id":1230,"date":"2021-07-09T09:07:28","date_gmt":"2021-07-09T07:07:28","guid":{"rendered":"https:\/\/nguenkam.com\/blog\/?p=1230"},"modified":"2022-10-12T09:44:28","modified_gmt":"2022-10-12T07:44:28","slug":"how-to-find-out-which-program-is-using-a-particular-port","status":"publish","type":"post","link":"https:\/\/nguenkam.com\/blog\/index.php\/2021\/07\/09\/how-to-find-out-which-program-is-using-a-particular-port\/","title":{"rendered":"How to find out which program is using a particular port?"},"content":{"rendered":"\n

Let\u00b4s say , we want to find out which program is using the port 80 and 443 in our computer.<\/strong><\/em> <\/span> (The port number started with 80 or 443)<\/em> <\/p>\n\n\n\n

Enter the following at the prompt (cmd): <\/p>\n\n\n\n

netstat -ano | findstr \/r 0.0:80 && netstat -ano | findstr 0.0:443<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
In the last column, you can see the process ID. Here for example 4<\/strong> for the port 80<\/em>, and 14256<\/strong> for the port 8000<\/em>.<\/p>\n\n\n\n
Now, let\u00b4s insert this ID in the following command :<\/p>\n\n\n\n
tasklist \/FI \"PID eq 4\" \/FO TABLE<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
In this case, “System” uses port 80.<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
In this case (Process-ID = 14256),  a docker image is using the port 8000.<\/p>\n\n\n\n
<\/div>\n\n\n\n
Windows – Use Case<\/h4>\n\n\n\n
PS: the command to get the process-ID for a program using a specific port is : <\/span><\/em><\/p>\n\n\n\n
\/\/for port 80\nnetstat -ano | findstr \/r 0.0:80\n\n\/\/for port XXX\nnetstat -ano | findstr \/r 0.0:XXX<\/code><\/pre>\n\n\n\n
<\/p>\n\n\n\n
the task could be stopped\/ended with :<\/p>\n\n\n\n
\/\/ for port 80 in our case, because his PID is 4\ntaskkill \/pid 4 \/f<\/code><\/pre>\n\n\n\n
<\/p>\n\n\n\n
Linux – Use Case<\/h4>\n\n\n\n
To list any process listening to the port 8080:<\/p>\n\n\n\n
lsof -i:8080<\/code><\/pre>\n\n\n\n
To kill any process listening to the port 8080:<\/p>\n\n\n\n
kill -9 $(lsof -t -i:8080)<\/code><\/pre>\n\n\n\n
PS:  -9<\/code>\u00a0corresponds to the\u00a0SIGKILL - terminate immediately\/hard kill<\/code>. It implies the process will be killed forcefully.<\/p>\n","protected":false},"excerpt":{"rendered":"
Let\u00b4s say , we want to find out which program is using the port 80 and 443 in our computer. (The port number started with 80 or 443) Enter the following at the prompt (cmd): In the last column, you can see the process ID. Here for example 4 for the port 80, and 14256 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[93,348,269,345,188,347],"_links":{"self":[{"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1230"}],"collection":[{"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=1230"}],"version-history":[{"count":7,"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1230\/revisions"}],"predecessor-version":[{"id":2283,"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1230\/revisions\/2283"}],"wp:attachment":[{"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=1230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=1230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nguenkam.com\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=1230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}