Often we\u00a0encounter errors\u00a0that a particular required port is already being used by another process.<\/p>\n
The\u00a0steps to find out which process is using a particular port number is relatively easy in Linux but it can be a bit tricky on Solaris.<\/p>\n
Let us\u00a0see how to find process PID from port number<\/p>\n
There are 3 ways to find this out depending on\u00a0which package is installed in your OS.<\/p>\n
i) fuser<\/strong><\/span><\/p>\n The syntax of using fuser is For example, to find which process is using TCP port 23792,<\/p>\n root@dbhost1 etc]# fuser 23792\/tcp ii) netstat<\/strong><\/span><\/p>\n The syntax of using netstat to find process ID from port is For example, to find which process is using TCP port 23792,<\/p>\n [root@dbhost1 etc]# netstat -tulpn | grep 23792 iii) lsof<\/strong><\/span><\/p>\n The syntax of using lsof\u00a0to find process ID from port is For example, to find which process is using TCP port 23792,<\/p>\n [root@dbhost1 etc]# lsof -i tcp:23792 <\/p>\n Since these\u00a0utilities are generally not installed or available by default on Solaris operating system, we\u00a0use following easy script to find PID from port number.<\/p>\n Note: Save this script as check_port.sh and grant execute permissions using chmod +x to this script.<\/p>\n #!\/bin\/bash<\/p>\n # Get the process which listens on port<\/p>\n # $1 is the port we are looking for<\/p>\n if [ $# -lt 1 ] echo “Greping for your port, please be patient (CTRL+C breaks) … ”<\/p>\n for i in `ls \/proc` Now\u00a0the syntax of using this script is For example, to find which process is using TCP port 1521,<\/p>\n root@hostname # .\/check_port.sh 1521 That’s it. Please feel free to add\/suggest any new utilities to other users in comment section below.<\/p>\n Happy learning !<\/p>\n","protected":false},"excerpt":{"rendered":" Often we\u00a0encounter errors\u00a0that a particular required port is already being used by another process. The\u00a0steps to find out which process is using a particular port number is relatively easy in Linux but it can be a bit tricky on Solaris. Let us\u00a0see how to find process PID from port number 1. For Linux Operating System […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3582","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/posts\/3582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/comments?post=3582"}],"version-history":[{"count":1,"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/posts\/3582\/revisions"}],"predecessor-version":[{"id":3583,"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/posts\/3582\/revisions\/3583"}],"wp:attachment":[{"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/media?parent=3582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/categories?post=3582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oratraining.com\/blog\/wp-json\/wp\/v2\/tags?post=3582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nfuser <port>\/<protocol><\/strong><\/p>\n
\n23792\/tcp: 17006<\/p><\/blockquote>\n
\nnetstat\u00a0-tulpn | grep\u00a0<port><\/strong><\/p>\n
\ntcp 0 0 :::23792 :::* LISTEN 17006\/java<\/p><\/blockquote>\n
\nlsof -i <protocol>:<port><\/strong><\/p>\n
\nCOMMAND PID USER FD TYPE DEVICE SIZE\/OFF NODE NAME
\njava 17006 grid 170u IPv6 594633 0t0 TCP *:23792 (LISTEN)<\/p><\/blockquote>\n2. For Solaris Operating System<\/strong><\/span><\/h3>\n
\nthen
\necho “Please provide a port number parameter for this script”
\necho “e.g. $0 22”
\nexit
\nfi<\/p>\n
\ndo
\npfiles $i | grep AF_INET | grep $1
\nif [ $? -eq 0 ]
\nthen
\necho Is owned by pid $i
\nfi
\ndone<\/p><\/blockquote>\n
\n.\/check_port.sh <port number><\/p>\n
\nGreping for your port, please be patient (CTRL+C breaks) …
\nsockname: AF_INET 10.21.26.24 port: 1521
\nIs owned by pid 10279
\n^C<\/p><\/blockquote>\n