Solution for TNS-12557: TNS:protocol adapter not loadable

[oracle@test-machine01 admin]$
[oracle@test-machine01 admin]$ cat listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0.4/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = test-machine01)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCPS)(HOST = test-machine01)(PORT = 1522))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

WALLET_LOCATION =
   (SOURCE =
     (METHOD = FILE)
     (METHOD_DATA =
       (DIRECTORY = /u01/app/oracle/admin/db_wallet)
     )
   )

SSL_CLIENT_AUTHENTICATION = FALSE
[oracle@test-machine01 admin]$ 

[oracle@test-machine01 admin]$ lsnrctl start LISTENER

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 30-DEC-2021 14:10:19

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Starting /u01/app/oracle/product/11.2.0.4/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.4.0 - Production
System parameter file is /u01/app/oracle/product/11.2.0.4/db_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/11.2.0.4/db_1/diag/tnslsnr/test-machine01/listener_11g/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=test-machine01.)(PORT=1521)))
Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCPS)(HOST=test-machine01)(PORT=1522)))
TNS-12557: TNS:protocol adapter not loadable
 TNS-12560: TNS:protocol adapter error
  TNS-00527: Protocol Adapter not loadable


Listener failed to start. See the error message(s) above...

[oracle@test-machine01 admin]$

[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$  cd $ORACLE_HOME/lib
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$ pwd
/u01/app/oracle/product/11.2.0.4/db_1/lib
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$  ls -al libntcps*
-rw-r--r--. 1 oracle oinstall 306314 Dec 30 15:58 libntcps11.a
-rw-r--r--. 1 oracle oinstall 306314 Jul 15  2013 libntcps11_ee.a.dbl
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$

[oracle@test-machine01 lib]$ cp libntcps11.a libntcps11.a.backup
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$ cp libntcps11_ee.a.dbl libntcps11.a
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$  ls -al libntcps*
-rw-r--r--. 1 oracle oinstall 306314 Dec 30 15:58 libntcps11.a
-rw-r--r--. 1 oracle oinstall   7456 Dec 30 15:58 libntcps11.a.backup
-rw-r--r--. 1 oracle oinstall 306314 Jul 15  2013 libntcps11_ee.a.dbl
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$

[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$ sqlplus sys as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Thu Dec 30 15:56:48 2021

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Enter password:

Connected to:
Oracle Database 11g Release 11.2.0.4.0 - 64bit Production

SQL> show parameter unique

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_unique_name                       string      test01
SQL> shut immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> exit
Disconnected from Oracle Database 11g Release 11.2.0.4.0 - 64bit Production
[oracle@test-machine01 lib]$

[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$ pwd
/u01/app/oracle/product/11.2.0.4/db_1/lib
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$ relink all
writing relink log to: /u01/app/oracle/product/11.2.0.4/db_1/install/relink.log
[oracle@test-machine01 lib]$
[oracle@test-machine01 lib]$

[oracle@test-machine01 lib]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 23-JAN-2022 09:53:44

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date                14-DEC-2021 12:37:32
Uptime                    39 days 21 hr. 16 min. 12 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0.4/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/11.2.0.4/db_1/diag/tnslsnr/test-machine01/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=test-machine01)(PORT=1522)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=test-machine01)(PORT=1521)))
Services Summary...
The command completed successfully
[oracle@oda-jed-prod01 ucas_backup]$