Post Reopened by Stephen Kitt, Anthony Geoghegan, jlliagre, Jeff Schaller, Faheem Mitha
3 added 586 characters in body
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UPDATE:

[root@SERVER ~]# lsof -i :44316 -S
[root@SERVER ~]# netstat -a | grep 44316
tcp        0      0 *:44316                     *:*                         LISTEN      
[root@SERVER ~]# fuser 44316/tcp
[root@SERVER ~]# echo $?
1
[root@SERVER ~]# ss -ap | grep 44316
LISTEN     0      64                     :::44316                   :::*       
[root@SERVER ~]# telnet localhost 44316
Trying ::1...
Connected to localhost.
Escape character is '^]'.
test
Connection closed by foreign host.
[root@SERVER ~]# 

After days, it is still listening!

UPDATE:

[root@SERVER ~]# lsof -i :44316 -S
[root@SERVER ~]# netstat -a | grep 44316
tcp        0      0 *:44316                     *:*                         LISTEN      
[root@SERVER ~]# fuser 44316/tcp
[root@SERVER ~]# echo $?
1
[root@SERVER ~]# ss -ap | grep 44316
LISTEN     0      64                     :::44316                   :::*       
[root@SERVER ~]# telnet localhost 44316
Trying ::1...
Connected to localhost.
Escape character is '^]'.
test
Connection closed by foreign host.
[root@SERVER ~]# 

After days, it is still listening!

    Post Closed as "duplicate" by Archemar, dr01, Anthon, GAD3R, G-Man of
2 edited tags
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1
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What process is listening on a port?

[root@SERVER ~]# netstat -tulpn | grep 44316
tcp        0      0 :::44316                    :::*                        LISTEN      -                   
[root@SERVER ~]# lsof -i | grep 44316
[root@SERVER ~]# rpcinfo
   program version netid     address                service    owner
    100000    4    tcp6      ::.0.111               portmapper superuser
    100000    3    tcp6      ::.0.111               portmapper superuser
    100000    4    udp6      ::.0.111               portmapper superuser
    100000    3    udp6      ::.0.111               portmapper superuser
    100000    4    tcp       0.0.0.0.0.111          portmapper superuser
    100000    3    tcp       0.0.0.0.0.111          portmapper superuser
    100000    2    tcp       0.0.0.0.0.111          portmapper superuser
    100000    4    udp       0.0.0.0.0.111          portmapper superuser
    100000    3    udp       0.0.0.0.0.111          portmapper superuser
    100000    2    udp       0.0.0.0.0.111          portmapper superuser
    100000    4    local     /var/run/rpcbind.sock  portmapper superuser
    100000    3    local     /var/run/rpcbind.sock  portmapper superuser
    100024    1    udp       0.0.0.0.182.78         status     29
    100024    1    tcp       0.0.0.0.233.28         status     29
    100024    1    udp6      ::.211.157             status     29
    100024    1    tcp6      ::.149.214             status     29
    100021    1    udp       0.0.0.0.214.72         nlockmgr   superuser
    100021    3    udp       0.0.0.0.214.72         nlockmgr   superuser
    100021    4    udp       0.0.0.0.214.72         nlockmgr   superuser
    100021    1    tcp       0.0.0.0.208.233        nlockmgr   superuser
    100021    3    tcp       0.0.0.0.208.233        nlockmgr   superuser
    100021    4    tcp       0.0.0.0.208.233        nlockmgr   superuser
    100021    1    udp6      ::.236.54              nlockmgr   superuser
    100021    3    udp6      ::.236.54              nlockmgr   superuser
    100021    4    udp6      ::.236.54              nlockmgr   superuser
    100021    1    tcp6      ::.173.28              nlockmgr   superuser
    100021    3    tcp6      ::.173.28              nlockmgr   superuser
    100021    4    tcp6      ::.173.28              nlockmgr   superuser
    100011    1    udp       0.0.0.0.3.107          rquotad    superuser
    100011    2    udp       0.0.0.0.3.107          rquotad    superuser
    100011    1    tcp       0.0.0.0.3.107          rquotad    superuser
    100011    2    tcp       0.0.0.0.3.107          rquotad    superuser
    100005    1    udp       0.0.0.0.168.181        mountd     superuser
    100005    1    tcp       0.0.0.0.227.100        mountd     superuser
    100005    1    udp6      ::.156.16              mountd     superuser
    100005    1    tcp6      ::.221.194             mountd     superuser
    100005    2    udp       0.0.0.0.164.189        mountd     superuser
    100005    2    tcp       0.0.0.0.184.174        mountd     superuser
    100005    2    udp6      ::.139.191             mountd     superuser
    100005    2    tcp6      ::.234.54              mountd     superuser
    100005    3    udp       0.0.0.0.151.108        mountd     superuser
    100005    3    tcp       0.0.0.0.219.117        mountd     superuser
    100005    3    udp6      ::.177.166             mountd     superuser
    100005    3    tcp6      ::.216.151             mountd     superuser
    100003    2    tcp       0.0.0.0.8.1            nfs        superuser
    100003    3    tcp       0.0.0.0.8.1            nfs        superuser
    100003    4    tcp       0.0.0.0.8.1            nfs        superuser
    100227    2    tcp       0.0.0.0.8.1            nfs_acl    superuser
    100227    3    tcp       0.0.0.0.8.1            nfs_acl    superuser
    100003    2    udp       0.0.0.0.8.1            nfs        superuser
    100003    3    udp       0.0.0.0.8.1            nfs        superuser
    100003    4    udp       0.0.0.0.8.1            nfs        superuser
    100227    2    udp       0.0.0.0.8.1            nfs_acl    superuser
    100227    3    udp       0.0.0.0.8.1            nfs_acl    superuser
    100003    2    tcp6      ::.8.1                 nfs        superuser
    100003    3    tcp6      ::.8.1                 nfs        superuser
    100003    4    tcp6      ::.8.1                 nfs        superuser
    100227    2    tcp6      ::.8.1                 nfs_acl    superuser
    100227    3    tcp6      ::.8.1                 nfs_acl    superuser
    100003    2    udp6      ::.8.1                 nfs        superuser
    100003    3    udp6      ::.8.1                 nfs        superuser
    100003    4    udp6      ::.8.1                 nfs        superuser
    100227    2    udp6      ::.8.1                 nfs_acl    superuser
    100227    3    udp6      ::.8.1                 nfs_acl    superuser
[root@SERVER ~]# netstat --program --numeric-hosts --numeric-ports --extend | grep 44316
[root@SERVER ~]# lsb_release -a
LSB Version:    :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID: RedHatEnterpriseServer
Description:    Red Hat Enterprise Linux Server release 6.7 (Santiago)
Release:    6.7
Codename:   Santiago
[root@SERVER ~]# 

Question: What is 44316 used for? Is it some kind of kernel process? But what?

There were already topics on these, but as you can see, none of the solutions show what is it used for.