sqlplus / as sysdba is giving username/password error

[oracle@test-test-dbs-]$ !sq
sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Mon Oct 29 09:35:07 2018

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

ERROR:
ORA-01017: invalid username/testsword; logon denied


Enter user-name: ^C

If you get the above error, Please check the below file's entry.

Below entry must be available for Linux.

SQLNET.AUTHENTICATION_SERVICES=ALL 

Below entry must be available for Linux.

#SQLNET.AUTHENTICATION_SERViICES = (NTS)

[oracle@test-pas-dbs-p01 admin]$ cat sqlnet.ora

#SQLNET.AUTHENTICATION_SERViICES = (NTS)

SQLNET.AUTHENTICATION_SERVICES=ALL

[oracle@test-pas-dbs-p01 admin]$