Oracle Process Status

TNSListener:

ps -ef | grep -i lsnr

or

ps -fu oracle | grep lsnr

To find Oracle Process:
----------------------------

ps -ef | grep -i pmon

or

ps -ef | grep -i smon

-- using ps to find the PID of listener processes
/home/oracle> ps -fu oracle | grep lsnr
oracle    8683  8462  0 12:10 pts/0    00:00:00 grep lsnr
oracle   28793     1  0 Apr26 ?        00:00:28 /software/grid/bin/tnslsnr LISTENER_SCAN1 -inherit
oracle   31744     1  0 Apr26 ?        00:00:49 /software/grid/bin/tnslsnr LISTENER -inherit

-- using lsof to list IP ports (using numerics) opened by the specified PID
/home/oracle> /usr/sbin/lsof  -n -P -p 31744 | grep IP
tnslsnr 31744 oracle   12u  IPv4            2154732                 TCP 127.0.0.1:41209->127.0.0.1:6100 (ESTABLISHED)
tnslsnr 31744 oracle   14u  IPv4            2154769                 TCP 10.251.95.67:1521 (LISTEN)
tnslsnr 31744 oracle   15u  IPv4            2154770                 TCP 10.251.95.80:1521 (LISTEN)
tnslsnr 31744 oracle   16u  IPv4            2155930                 TCP 10.251.95.80:1521->10.251.95.80:44979 (ESTABLISHED)
tnslsnr 31744 oracle   18u  IPv4            5171001                 TCP 10.251.95.80:1521->10.251.95.80:46779 (ESTABLISHED)
oracle@nvs-dev1: /home/oracle>