Why does netstat not show the process PID/Program Name in RHEL
Issue
- Some applications that are bound to a specific port suddenly cannot start due to the port reservation conflict.
- A telnet command against the port shows that the socket is open but no process can be identified either.
- A dash(-) is seen in the column "PID/Program Name", as shown below:
[user@localhost ~]$ netstat -plnt | head -5
(No info could be read for "-p": geteuid()=500 but you should be root.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:49234 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
Environment
- Red Hat Enterprise Linux
- Network services
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