C:\ora18xe\dbhomeXE>sqlplus system/qqq@XE

SQL*Plus: Release 18.0.0.0.0 - Production on Sat Jan 16 21:06:31 2021
Version 18.4.0.0.0

Copyright (c) 1982, 2018, Oracle.  All rights reserved.

ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified


Enter user-name:
C:\ora18xe\dbhomeXE>echo %PATH%
C:\ora18xe\dbhomeXE\bin;C:\Program Files\ukm-common-files;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\

C:\ora18xe\dbhomeXE\network\admin>type listener.ora
# listener.ora Network Configuration File: C:\ora18xe\dbhomeXE\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

DEFAULT_SERVICE_LISTENER = XE

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\ora18xe\dbhomeXE)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:C:\ora18xe\dbhomeXE\bin\oraclr18.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.62)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

C:\ora18xe\dbhomeXE\network\admin>lsnrctl status

LSNRCTL for 64-bit Windows: Version 18.0.0.0.0 - Production on 16-JAN-2021 21:07:37

Copyright (c) 1991, 2018, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.62)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 18.0.0.0.0 - Production
Start Date                16-JAN-2021 21:02:06
Uptime                    0 days 0 hr. 5 min. 32 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Default Service           XE
Listener Parameter File   C:\ora18xe\dbhomeXE\network\admin\listener.ora
Listener Log File         C:\ora18xe\diag\tnslsnr\PC-╧╩-1\listener\alert\log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.62)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

C:\ora18xe\dbhomeXE\network\admin>ver

Microsoft Windows [Version 6.1.7601]