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Oracle Database 18c : Add Oracle Net Listener2018/12/05

Add Oracle Net Listener that is the network service on Oracle.
[1] Login with the oracle admin user and input a command [netca] like follows.
[oracle@dlp ~]$ netca

[2] Check a box [Listener Configuration] and go next.
[3] Go next.
[4] Set Listner's name. Set any name you like.
[5] This example goes next with keeping default [TCP].
[6] Set a port. This example goes next with keeping default.
[7] If you'd like to create more Listeners, Answer [Yes]. This example selects [No].
[8] Configuration completed.
[9] After creating Listener, tnslsnr listens on the port you configured like follows.
[oracle@dlp ~]$
ss -napt | grep 1521

LISTEN     0      128         :::1521                    :::*                   users:(("tnslsnr",pid=17508,fd=8))
TIME-WAIT  0      0         ::ffff:                  ::ffff:

[oracle@dlp ~]$
tnsping localhost

TNS Ping Utility for Linux: Version - Production on 05-DEC-2018 15:49:12

Copyright (c) 1997, 2018, Oracle.  All rights reserved.

Used parameter files:

Used HOSTNAME adapter to resolve the alias
OK (10 msec)
[10] If Firewalld is running, allow listener port.
[root@dlp ~]#
firewall-cmd --add-port=1521/tcp --permanent

[root@dlp ~]#
firewall-cmd --reload

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