OS: Oracle Linux 6.8
DB Installed: Oracle 12.1.0.2
Oracle VM used.
Problem: I was able to install Oracle DB 12c successfully. But when I try to create a listener using DBCA, I get the message that port is in use. I have tried different ports but get the same message. Please see the screen shots below that show the error message. I am also including screen shots that shows the ports in use. Any advice would be appreciated. This is for student learning, I can remove anything per your advice. Thank you for your help and time.
]# netstat -nlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:13349 0.0.0.0:* LISTEN 1728/rpc.statd
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1671/rpcbind
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 2085/sshd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 1766/cupsd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2182/master
tcp 0 0 :::55529 :::* LISTEN 1728/rpc.statd
tcp 0 0 :::60554 :::* LISTEN 2768/ora_d000_cdb1
tcp 0 0 :::111 :::* LISTEN 1671/rpcbind
tcp 0 0 :::22 :::* LISTEN 2085/sshd
tcp 0 0 ::1:631 :::* LISTEN 1766/cupsd
udp 0 0 0.0.0.0:39858 0.0.0.0:* 1728/rpc.statd
udp 0 0 0.0.0.0:998 0.0.0.0:* 1671/rpcbind
udp 0 0 0.0.0.0:68 0.0.0.0:* 1768/dhclient
udp 0 0 0.0.0.0:111 0.0.0.0:* 1671/rpcbind
udp 0 0 10.0.2.15:123 0.0.0.0:* 2096/ntpd
udp 0 0 127.0.0.1:123 0.0.0.0:* 2096/ntpd
udp 0 0 0.0.0.0:123 0.0.0.0:* 2096/ntpd
udp 0 0 0.0.0.0:631 0.0.0.0:* 1766/cupsd
udp 0 0 127.0.0.1:659 0.0.0.0:* 1728/rpc.statd
udp 0 0 :::998 :::* 1671/rpcbind
udp 0 0 :::111 :::* 1671/rpcbind
udp 0 0 fe80::a00:27ff:fe22:a168:123 :::* 2096/ntpd
udp 0 0 ::1:123 :::* 2096/ntpd
udp 0 0 :::123 :::* 2096/ntpd
udp 0 0 ::1:24821 :::* 2770/ora_s000_cdb1
udp 0 0 :::18811 :::* 1728/rpc.statd
udp 0 0 ::1:9700 :::* 2760/ora_lreg_cdb1
udp 0 0 ::1:42476 :::* 2768/ora_d000_cdb1
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program name Path
unix 2 [ ACC ] STREAM LISTENING 15181 2068/mcelog /var/run/mcelog-client
unix 2 [ ACC ] STREAM LISTENING 16530 2335/Xorg /tmp/.X11-unix/X0
unix 2 [ ACC ] STREAM LISTENING 18914 2539/pulseaudio /tmp/.esd-500/socket
unix 2 [ ACC ] STREAM LISTENING 18916 2539/pulseaudio /home/oracle/.pulse/15198717f8640482900fb0f800000021-runtime/native
unix 2 [ ACC ] STREAM LISTENING 18191 2441/gnome-session /tmp/.ICE-unix/2441
unix 2 [ ACC ] STREAM LISTENING 18210 2506/gconfd-2 /tmp/orbit-oracle/linc-9ca-0-66c76fc0af4f3
unix 2 [ ACC ] STREAM LISTENING 18433 2441/gnome-session /tmp/orbit-oracle/linc-989-0-1cdf3059b94ca
unix 2 [ ACC ] STREAM LISTENING 17784 2431/gnome-keyring- /tmp/keyring-CRxP97/socket
unix 2 [ ACC ] STREAM LISTENING 18505 2510/gnome-settings /tmp/orbit-oracle/linc-9ce-0-5f52e5d518e16
unix 2 [ ACC ] STREAM LISTENING 18596 2431/gnome-keyring- /tmp/orbit-oracle/linc-97f-0-31942e9320fad
unix 2 [ ACC ] STREAM LISTENING 18599 2431/gnome-keyring- /tmp/keyring-CRxP97/socket.ssh
unix 2 [ ACC ] STREAM LISTENING 18600 2431/gnome-keyring- /tmp/keyring-CRxP97/socket.pkcs11
unix 2 [ ACC ] STREAM LISTENING 18731 2523/seahorse-daemo /tmp/orbit-oracle/linc-9db-0-69d11a66962cf
unix 2 [ ACC ] STREAM LISTENING 18836 2533/metacity /tmp/orbit-oracle/linc-9e5-0-4fe35f73cdaae
unix 2 [ ACC ] STREAM LISTENING 18967 2548/gconf-helper /tmp/orbit-oracle/linc-9f4-0-2d8003e869d41
unix 2 [ ACC ] STREAM LISTENING 18190 2441/gnome-session @/tmp/.ICE-unix/2441
unix 2 [ ACC ] STREAM LISTENING 18982 2540/gnome-panel /tmp/orbit-oracle/linc-9ec-0-6a6eaf3f80dba
unix 2 [ ACC ] STREAM LISTENING 19144 2569/bonobo-activat /tmp/orbit-oracle/linc-a09-0-7b8f88f3e96ea
unix 2 [ ACC ] STREAM LISTENING 19281 2585/wnck-applet /tmp/orbit-oracle/linc-a19-0-17e5d3681f1e3
unix 2 [ ACC ] STREAM LISTENING 19294 2586/trashapplet /tmp/orbit-oracle/linc-a1a-0-517ee63c20e9a
unix 2 [ ACC ] STREAM LISTENING 16529 2335/Xorg @/tmp/.X11-unix/X0
unix 2 [ ACC ] STREAM LISTENING 19705 2655/gnome-screensa /tmp/orbit-oracle/linc-a27-0-33c5b32366a73
unix 2 [ ACC ] STREAM LISTENING 19819 2608/gpk-update-ico /tmp/orbit-oracle/linc-a30-0-35d6e3a687e25
unix 2 [ ACC ] STREAM LISTENING 20022 2604/gnome-power-ma /tmp/orbit-oracle/linc-a2c-0-2c8051d7bdce4
unix 2 [ ACC ] STREAM LISTENING 20037 2610/bluetooth-appl /tmp/orbit-oracle/linc-a32-0-35a2c2efc235e
unix 2 [ ACC ] STREAM LISTENING 20156 2564/nautilus /tmp/orbit-oracle/linc-a04-0-18b1e94014e3d
unix 2 [ ACC ] STREAM LISTENING 13993 1691/dbus-daemon /var/run/dbus/system_bus_socket
unix 2 [ ACC ] STREAM LISTENING 20163 2613/nm-applet /tmp/orbit-oracle/linc-a35-0-714e0b361c050
unix 2 [ ACC ] STREAM LISTENING 20411 2673/notification-a /tmp/orbit-oracle/linc-a71-0-64532b6df07ee
unix 2 [ ACC ] STREAM LISTENING 20430 2672/gdm-user-switc /tmp/orbit-oracle/linc-a70-0-4cb5248bff30
unix 2 [ ACC ] STREAM LISTENING 20494 2674/clock-applet /tmp/orbit-oracle/linc-a72-0-5b44af303da93
unix 2 [ ACC ] STREAM LISTENING 20559 2670/gnote /tmp/orbit-oracle/linc-a6e-0-770c54b6e8f05
unix 2 [ ACC ] STREAM LISTENING 20745 2707/gnome-terminal /tmp/orbit-oracle/linc-a93-0-556574edeb079
unix 2 [ ACC ] STREAM LISTENING 15511 2182/master public/cleanup
unix 2 [ ACC ] STREAM LISTENING 15516 2182/master private/tlsmgr
unix 2 [ ACC ] STREAM LISTENING 15519 2182/master private/rewrite
unix 2 [ ACC ] STREAM LISTENING 15522 2182/master private/bounce
unix 2 [ ACC ] STREAM LISTENING 15525 2182/master private/defer
unix 2 [ ACC ] STREAM LISTENING 15528 2182/master private/trace
unix 2 [ ACC ] STREAM LISTENING 15531 2182/master private/verify
unix 2 [ ACC ] STREAM LISTENING 15534 2182/master public/flush
unix 2 [ ACC ] STREAM LISTENING 15537 2182/master private/proxymap
unix 2 [ ACC ] STREAM LISTENING 15540 2182/master private/proxywrite
unix 2 [ ACC ] STREAM LISTENING 15543 2182/master private/smtp
unix 2 [ ACC ] STREAM LISTENING 15546 2182/master private/relay
unix 2 [ ACC ] STREAM LISTENING 15549 2182/master public/showq
unix 2 [ ACC ] STREAM LISTENING 15552 2182/master private/error
unix 2 [ ACC ] STREAM LISTENING 15555 2182/master private/retry
unix 2 [ ACC ] STREAM LISTENING 10297 1/init @/com/ubuntu/upstart
unix 2 [ ACC ] STREAM LISTENING 15558 2182/master private/discard
unix 2 [ ACC ] STREAM LISTENING 18055 2450/dbus-daemon @/tmp/dbus-7fGjUO2KC5
unix 2 [ ACC ] STREAM LISTENING 15561 2182/master private/local
unix 2 [ ACC ] STREAM LISTENING 15564 2182/master private/virtual
unix 2 [ ACC ] STREAM LISTENING 15567 2182/master private/lmtp
unix 2 [ ACC ] STREAM LISTENING 15570 2182/master private/anvil
unix 2 [ ACC ] STREAM LISTENING 15573 2182/master private/scache
unix 2 [ ACC ] STREAM LISTENING 14534 1816/hald @/var/run/hald/dbus-FoncMpYgd5
unix 2 [ ACC ] STREAM LISTENING 16739 2332/gdm-simple-sla @/tmp/gdm-session-MXBJAsPC
unix 2 [ ACC ] STREAM LISTENING 15651 2211/abrtd /var/run/abrt/abrt.socket
unix 2 [ ACC ] STREAM LISTENING 14527 1816/hald @/var/run/hald/dbus-Wwt63CMs4K
unix 2 [ ACC ] STREAM LISTENING 16611 2332/gdm-simple-sla @/tmp/gdm-greeter-PjqCYpmH
unix 2 [ ACC ] STREAM LISTENING 13912 1671/rpcbind /var/run/rpcbind.sock
unix 2 [ ACC ] STREAM LISTENING 14404 1766/cupsd /var/run/cups/cups.sock
unix 2 [ ACC ] STREAM LISTENING 14493 1804/acpid /var/run/acpid.soc