For the purpose of learning, I have installed Oracle 18c XE v18.4.0.0 and Oracle SQL Developer v21.4.2. I have no previous experience with Oracle database.
Command LSNRCTL stat seems to show correct results:
LSNRCTL stat output
I am trying to connect to XEPDB1 Plugin database by using sqlplus command:
sqlplus system/oracle#192.168.1.102:1521/XEPDB1
(192.168.1.102 is my local IP)
but everytime I tried so, service OracleOraDB18Home1TNSListener (and listener also) stops.
Then I start it again manually and try again to connect to XEPDB1 but the same thing happen again.
Respond to connection command after few minutes is: ERROR: ORA-12537: TNS:connection closed.
Files listener.ora and tnsnames.ora are not modified after fresh installation of Oracle 18c XE.
Much appreciate if anybody can help me.
Hi I want a to build Duplicate Database server in oracle 11g with rman duplicate feature I install software only not full database during installation.
Listner is started but when connecting sqlplus / as sysdba get this error ORA-12560: TNS:protocol adaptor error
OS is Windows Server 2012 R2
I followed this steps to install Oracle 19.6.0 for Ubuntu 18.04:
https://medium.com/#TechExpertise/installing-oracle-sql-developer-on-ubuntu-16-04-lts-bfa4af959deb
Then for some reason I was not able to open sqlplus, so I followed this steps as solution:
https://gist.github.com/tcnksm/7316877
And now I want to log in sqlplus by typing sqlplus / as sysdba, but I am getting:
ERROR: ORA-12545: Connect failed because target host or object does
not exist
So I think I have to make the appropriate settings in listener.ora and tnsnames.ora,
but I am missing this files.
SQL Developer and SQL*Plus are client only tools that connect to a database that must be running somewhere: either on the same host or on another host.
If this database exists you should have its connect string to connect to it with SQL Developer or SQL*Plus
If this database does not exist, you must first create it: there are several ways to do this in addition to install Oracle Database (server - not client) and to create a database:
install Oracle XE 18c on Oracle Linux or Windows: installation will install database software and create a database at the same time (easier for non database specialist)
use a pre-installed VM such as: https://www.oracle.com/database/technologies/databaseappdev-vm.html.
Just installed Oracle 11g XE (Windows), but can't connect in SQL Developer or run any command in CLI.
When try to connect in CLI using SYS or SYSTEM with password defined during the install, get the following error:
ORA-12638: credential retrieval failed
When I tray to connect via SQL Developer (tried via SID and Service Name, hostname=localhost, port=1521, SID=xe), get this error:
Status : Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in
connect descriptor
Already tried change SQLNET.AUTHENTICATION_SERVICES = (NTS) to (NONE) in sqlnet.ora file. When I do this, get the following error when try to connect with the SYS or SYSTEM user and password:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Already tried every solution in Google results, like reinstall, stop and start services... Mostly ask for first connect in CLI to make some changes, but even this I can't accomplish.
Any suggestions on how connect to the database?
Found the solution:
I was installing in my company Windows user domain.
First uninstall any instance of Oracle XE 11g.
Switch to a local administrator Windows user and install Oracle XE 11g.
Sign off and back to company Windows user.
Edit the file C:\oraclexe\app\oracle\product\11.2.0\server\network\ADMIN\sqlnet.ora (or equivalent to your installation path). Change SQLNET.AUTHENTICATION_SERVICES = (TNS) to SQLNET.AUTHENTICATION_SERVICES = (NONE).
This change will allow you connect to database from you company Windows user.
As seen here: Error ORA-12638 in Oracle Database 11g
Try the following: Open command window, cd to Oracle bin directory, enter sqlplus /nolog. If you get a prompt enter connect / as sysdba. If you get connected then you can try "startup".
- -
Did you try to start the Oracle RDBMS service via Services (services.msc)?
Do you use an spfile? Check the registry for ORA_SID_NAME_PFILE that is different from default location of $ORACLE_HOME/dbs. Also check the default location. Use only the default location or the registry entry removing either the registry entry or the file in the default location depending on which you want to use.
I am configuring a server in CentOS 7 to connect to an Oracle database within the same network. IP ORACLE = 192.167.10.100 IP SERVER = 192.167.15.123
I have installed the Instant Client Package: Basic, SDK and SQL * Plus. Download link
Then set the environment variables:
ORACLE_HOME=/usr/lib/oracle/12.2/client64
PATH=$PATH:$ORACLE_HOME/bin
LD_LIBRARY_PATH=$ORACLE_HOME/lib
TNS_ADMIN=$ORACLE_HOME/network/admin
When entering with the SQL * Plus through the implicit connection string: With the format.
sqlplus username/password#host:port/sid
sqlplus testuser/orcltiger#192.167.10.100:1521/testdb
I get the error: ORA-12170: TNS: the connection timeout occurred
I have been able to connect with the same credentials from a Windows PC with Oracle SQL Developer but from CentOS I get an error:
Someone to help me find the solution, please.