Unable to connect to host: SQL Developer in Virtualbox:linux:oracle

Similar Questions

• Failed to connect to 11G Sql developer XE

  Hi gurus,
  
  I tried for more than a week to make this work. Basically, I am trying to install database XE 11.2.0 on my 64-bit windows computer 7.
  I had problems with the listener getting, finally managed to get to the top by removing the Oracle_home and reinstall 11 g XE.
  Changed the listener.ora file to include the XE - rebooted sid th listener so now its working.
  
  -I am able to start the instance of the as command prompt
  *********************************************
  SQL > conn / as sysdba
  Connected.
  SQL > startup
  ORACLE instance started.
  
  Total System Global Area 1071333376 bytes
  Bytes of size 1388352 fixed
  620757184 variable size bytes
  444596224 of database buffers bytes
  Redo buffers 4591616 bytes
  ORA-00205: error in the identification of control files, see log alerts for more information *.
  
  When I checked the logs here are the details
  of C:\Oracle11XE\app\oracle\diag\rdbms\xe\xe\alert
  
  < txt > ORA-00210: could not open the specified control file
  ORA-00202: control file: & apos; C:\ORACLE11XE\APP\ORACLE\ORADATA\XE\CONTROL. DBF & apos;
  ORA-27041: could not open the file
  04002 - OSD: could not open the file
  S/O-error: (OS 2) the system cannot find the file specified.
  < / txt >
  ***********************************************************************************************
  Please let me know how I can fix this issue. The final objective is to get the operational database and be able to conenct to the Sql Developer installed on the same machine.
  
  any help will be greatly appreciated.
  
  Here are some details
  
  tnsnames.ora
  **********
  
  XE =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = TCP) (HOST = < Cumputername >)(PORT = 1521))
  (CONNECT_DATA =
  (SERVER = DEDICATED)
  (SID = XE)
  )
  )
  
  EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = CIP)(KEY = EXTPROC1))
  )
  (CONNECT_DATA =
  (SID = PLSExtProc)
  (PRESENTATION = RO)
  )
  )
  
  ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = CIP)(KEY = EXTPROC1))
  )
  (CONNECT_DATA =
  (SID = CLRExtProc)
  (PRESENTATION = RO)
  )
  )
  
  Listener.ora
  ********
  SID_LIST_LISTENER =
  (SID_LIST =
  (SID_DESC =
  (SID_NAME = PLSExtProc)
  (ORACLE_HOME = C:\Oracle11XE\app\oracle\product\11.2.0\server)
  (= Extproc PROGRAM)
  )
  (SID_DESC =
  (SID_NAME = CLRExtProc)
  (ORACLE_HOME = C:\Oracle11XE\app\oracle\product\11.2.0\server)
  (= Extproc PROGRAM)
  )
  (SID_DESC =
  (SID_NAME = XE)
  (ORACLE_HOME = C:\Oracle11XE\app\oracle\product\11.2.0\server)
  (= Extproc PROGRAM)
  )
  
  )
  
  LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = CIP)(KEY = EXTPROC1))
  (ADDRESS = (PROTOCOL = TCP) (HOST = < ComputerName >)(PORT = 1521))
  )
  )
  
  DEFAULT_SERVICE_LISTENER = (XE)
  
  result of lsnrctl status
  *****************************
  LSNRCTL > status
  Connection to (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1)))
  STATUS of the LISTENER
  ------------------------
  Alias LISTENER
  Version TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Prod
  ction
  Departure date January 30, 2013 11:35:47
  Uptime 0 days 0 h 0 min 13 sec
  Draw level off
  Security ON: OS Local Authentication
  SNMP OFF
  Default Service XE
  Listener parameter File C:\Oracle11XE\app\oracle\product\11.2.0\server\network
  \admin\listener.ora
  Listener log file C:\Oracle11XE\app\oracle\diag\tnslsnr\ZaidHP\listener\
  alert\log. XML
  Summary of endpoints listening...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1ipc)))
  (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp)(HOST=ZaidHP) (PORT = 1521)))
  Summary of services...
  Service 'CLRExtProc' has 1 instance (s).
  Instance of 'CLRExtProc', status UNKNOWN, has 1 operation for this service...
  Service 'PLSExtProc' has 1 instance (s).
  Instance of 'PLSExtProc', status UNKNOWN, has 1 operation for this service...
  "XE" service has 1 instance (s).
  Instance "XE", status UNKNOWN, has 1 operation for this service...
  The command completed successfully
  
  Thank you
  
  Published by: user12026382 on January 30, 2013 10:57

  ORA-00205: error in the identification of control files, see log alerts for more information

  It's a symptom of an execution incomplete Installer, basically you have a database at startup. It's I think, anyway.

  Only suggestion is to make an uninstall, after all the uninstall the steps outlined in the Installation Guide for Windows, then try running Setup.

  With later versions of Windows, some things have need a session "run as Administrator". And that's it, as far as I know of the Windows operating system.

  See http://docs.oracle.com/cd/E17781_01/install.112/e18803/toc.htm#CIHDDHJD

• How to connect container with SQL developer

  Hi all

  This is probably a trivial question-, but I'm not able to find the answer. I use sqlplus most of the time, so I am not familiar with SQL developer.

  I have 12 c and container named ORACONTAINER, in this container, I HR schema.

  When I do connect via sqlplus ("sqlplus hr/hr@ORACONTAINER') - it works well, and"sqlplus HR/HR"will not work - and that's ok.

  With SQL developer I can connect as sys, but when I try h/h it gives me name of username/password invalid - because I do not know where to specify the user HR container.

  Thank you

  Darko

  Try to give ORACONTAINER service name in sql developer.

• Connect the JSK &amp; Sql developer

  Hello

  Someone trying to connect JSK SQL Developer? I tried to do by using the credentials of DB that I could see in server.xml but without success.

  Thank you!

  Usually the HSQLDB JSK uses works in memory mode, not in Server mode - see "Server Modes" at http://hsqldb.org/doc/guide/running-chapt.html. This means that it is not possible to use a tool like SQL Developer, TOAD, squirrel etc to connect in it. You can manually write a script so that it starts the DB in Server mode, you will need to change the jdbc connection string in server.xml in an appropriate manner. Then you should be able to use an external tool to reach the DB using the same jdbc connection string.

  If you just need to make a simple few queries then you can try the query tool that comes with HSQLDB. It is very basic, but has the advantage that you need not change the DB mode, it can connect to a DB in memory of a JSK running. To run it, find the hsqldb.jar in JSK and run:

  Java - cp hsqldb.jar org.hsqldb.util.DatabaseManagerSwing

  Phil

• Connection problem with SQL Developer 3.0.0.4

  I have a strange problem with SQL Developer (SD) 3.0.0.4. So that the implementation of a new connection I have in double entries listed for some of the databases listed in my TNSNAMES.ora file. When I try to connect to one of the databases has entered duplicated, I get the following Oracle error:

  ORA-01034: Oracle not available ORA-27101: Kingdom does not exist SVR4 shared memory error: 2: no files or directory

  however, if I try to connect to the same database using SQL * more or TOAD, it works perfectly and TOAD has no duplicates.
  
  At first, I thought maybe that SD has been reading multiple copies of the TNSNAMES.ora so I checked and removed all the duplicate files and set the variable of environment TNS_ADMIN to point to that and the single instance of the TNSNAMES.ora file. Yet once, SQLPlus and TOAD to work fine, but SD is always showing entries twice and always have reported the above error when I try to connect to a database with a duplicate entry. I should mention, I'm able to connect to the database that have only a single entry listed use SD.
  
  If I understand correctly, SD uses JDBC as underlying connection mechanism. Based on this "agreement" I thought that maybe I had a file corrupted in the Java Cache, so I cleared the cache, but I always get errors.
  
  As mentioned, I use SQL Developer 3.0.0.4 with Java 1.6.0_11 (included in the download). In addition, I have installed JRE 1.6.0_24 and I am running Windows XP SP3. Any ideas or suggestions are greatly appreciated.
  
  Craig...

  Hi Craig,.

  Or, if I have misunderstood completely the scenario you describe, here's a post on the forum about duplicate entries appear in the drop-down list Alias network when the connection Type is TNS:

  Developer SQL 2.1.0.63 TNS name in characters of the connection

  This solution involves clean a bad TNSNAMES. ORA file with double score entries to test the death of SID.

  -Gary

• Unable to connect to MS sql server using ODI 11 g

  Hello

  I am trying to connect to my sql server in odi 11 g. I get the error message like "cannot load jdbc driver class.»  to do this, the sqljdbc.jar file put in drive c:\.

  Even if I am getting error. Please resolve this issue and please send any document on this example.

  
  

  Thanks in advance,

  A.Kavya.

  

  Make sure that the drivers are located in the appropriate folder - see link for required locations

  http://odiexperts.com/drivers-location-in-ODI-11g/

  Also if your target is MSSQL 2005 or longer you will need the 4.x version of jdbc drivers that can be downloaded here...

  https://msdn.Microsoft.com/en-us/SQLServer/aa937724.aspx

• Unable to connect the host server alone on the bridge or a NAT server network

  I have configuered 5 comments OS (windows server 2003) on Vmware workstation (on a single host). Among them three servers are on the network host and two others respectively is on the bridge network and NAT. All the guest OS is on a local network (i.e. team).

  I can connect on the bridge or a NAT server to the internet. But I can't ping on the server (on the bridge or NAT) servers (on the single host network). IP address assigned to the host only network is the subnet of class A. And on the bridge or a NAT server is dynamically assigned by the DHCP service.

  Can someone help me?

  whether you are able to connect all the virtual machines, you have 2 options:

  -connect all your virtual machines on the host network

  -If you really need to keep your 2 VMs on the bridge and NAT, you must assign the 2 network cards to those virtual machines. One of the cards connected in Bridged/NAT and the other network card NETWORK connected to host only.

  concerning

  Jose

• SQL Developer for ubuntu linux?

  Hi everyone, anyone know if SQL developer is available for linux ubuntu? I see no download for linux debian style. I see that the number of TOWERS download for linux. Thank you very much for the help.

  PL see these threads

  Re: Setup sql developer on Ubuntu

  http://samushka.blogspot.com/2009/04/installing-Oracle-SQL-Developer-on.html

  http://UbuntuForums.org/showthread.php?t=643938

  http://software.krimnet.com/Oracle/how-install-SQL-Developer-Ubuntu-904.htm

  HTH
  Srini

• Unable to connect to the SQL 2005 Express database

  I'm new to Flex and I try to use the application for creating the database wizard and I am not able to connect to one of my servers MS SQL or PostgreSQL. I get this error message:
  
  java.sql.SQLException: unknown server host name "10.40.213.80\SQLEXPRESS".
  to net.sourceforge.jtds.jdbc.ConnectionJDBC2. < init > (ConnectionJDBC2.java:364)
  to net.sourceforge.jtds.jdbc.ConnectionJDBC3. < init > (ConnectionJDBC3.java:50)
  at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:178)
  to org.eclipse.datatools.connectivity.db.generic.JDBCConnection.createConnection (JDBCConnect ion.java:87)
  at org.eclipse.datatools.connectivity.DriverConnectionBase.internalCreateConnection (DriverCo nnectionBase.java:104)
  at org.eclipse.datatools.connectivity.DriverConnectionBase.open (DriverConnectionBase.java:53)
  to org.eclipse.datatools.connectivity.db.generic.JDBCConnectionFactory.createConnection (JDBC ConnectionFactory.java:52)
  to org.eclipse.datatools.connectivity.internal.ConnectionFactoryProvider.createConnection (Co nnectionFactoryProvider.java:77)
  at org.eclipse.datatools.connectivity.internal.ConnectionProfile.createConnection (Link Profile .java: 354)
  to com.adobe.datatools.derived.wizards.BaseConnectionProfilePage.testConnectionSimple (BaseCo nnectionProfilePage.java:70)
  at com.adobe.datatools.derived.wizards.BaseConnectionProfilePage.testConnection (BaseConnecti onProfilePage.java:51)
  to org.eclipse.datatools.connectivity.ui.wizards.ConnectionProfileDetailsPage$ 1.widgetSelect ed(ConnectionProfileDetailsPage.java:85)
  at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227)
  at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
  at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
  at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
  at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
  at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
  at org.eclipse.jface.window.Window.open(Window.java:796)
  to com.adobe.flexbuilder.dbwizard.ui.DbWizard$ 8.widgetSelected(DbWizard.java:598)
  at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227)
  at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
  at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
  at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
  at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
  at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
  at org.eclipse.jface.window.Window.open(Window.java:796)
  at com.adobe.flexbuilder.dbwizard.actions.DBWizardAction.run(DBWizardAction.java:69)
  at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:256)
  at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)
  at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection (ActionContributionI tem.java:546)
  to org.eclipse.jface.action.ActionContributionItem.access$ 2 (ActionContributionItem.java:490)
  to org.eclipse.jface.action.ActionContributionItem$ 5.handleEvent (ActionContributionItem.java:402)
  at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
  at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
  at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
  at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
  at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
  at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
  to org.eclipse.ui.internal.Workbench.access$ 4 (Workbench.java:2219)
  to org.eclipse.ui.internal.Workbench$ 4.run(Workbench.java:466)
  at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
  at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
  at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
  at com.adobe.flexbuilder.standalone.FlexBuilderApplication.start (FlexBuilderApplication.java:112)
  at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)
  at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication (EclipseAppLau ncher.java:106)
  at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start (EclipseAppLauncher.jav one: 76)
  at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
  at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
  at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke (unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke (unknown Source)
  at java.lang.reflect.Method.invoke (unknown Source)
  at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
  at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
  at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
  at org.eclipse.equinox.launcher.Main.main(Main.java:1148)
  Caused by: java.net.UnknownHostException: 10.40.213.80\SQLEXPRESS
  at java.net.PlainSocketImpl.connect (unknown Source)
  at java.net.SocksSocketImpl.connect (unknown Source)
  at java.net.Socket.connect (unknown Source)
  at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke (unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke (unknown Source)
  at java.lang.reflect.Method.invoke (unknown Source)
  at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:289)
  to net.sourceforge.jtds.jdbc.SharedSocket. < init > (SharedSocket.java:250)
  to net.sourceforge.jtds.jdbc.ConnectionJDBC2. < init > (ConnectionJDBC2.java:297)
  ... more than 57
  I activated local and remote connections on my server, I can connect to them using connections DSN on Windows and other applications of web development such as MS visual studio. Y at - it requires no special configuration as flex?

  Well I uninstalled my SQLEXPRESS and just installed an instance of SQL 2005 standard and enabled TCP/IP connections and ta - da! Don't know if there is something else in SQLEXPRESS which must be activated but it works not now.

  Thank you!

• Unable to connect the host to the OpenVPN server in VM

  Hi VMware wizards!

  I have a problem with an installation of OpenVPN that fact in my head.

  Basically I have an ESXi with a Windows 2003 VM host. In the virtual Win2k3 machine I use OpenVPN.

  I can connect fine VPN and access windows can host one (the VPN server) and the router and other hosts on the local network.

  However, I can not connect with the VMIC ESXi host, no matter what I do. I can't ping, nothing.

  It's as if the ESXi host will not a package through the virtual switch to another subnet to connect to the management subnet.

  The main network is 10.51.35.0/24 and the VPN network is 10.51.36.0/24. The router has a route static send 10.51.36.0 to 10.51.36.1, which is the VPN interface on the Windows 2003 server which belongs to OpenVPN. The ESXi host has a default route to the router, and I can ping Internet from the service console.

  Still, all services on the LAN work as I expect of VPN, but I can't use the VMIC to connect to the ESXi host.

  Attached is a basic network design showing the configuration. It's pretty simple. I think it's a problem with the vSwitch or ESXi host somehow network config, but I am at a lost to troubleshoot any further... I can not ping the IP address of the VPN client from the service of ESXi console. Whatever it either to the service console simply refuses to go through the VPN, hosted by the virtual Windows machine.

  Ideas? TIA!

  > I install Ubuntu to host the OpenVPN instead of using Windows.

  Best solution. Ubuntu, it is also supported in ESX and you will have more control of it

  André

• Unable to connect after host moves

  Hello
  
  I recently moved my Oracle 10 g server to a new host for testing.
  Everything seems to plan...
  And go to the top of the command line produces no error.
  I was successfully able to connect and run queries through the web interface from the command line or isqlplus, however when I launch enterprise manager to the instance database and "connection to the instance of the agent" ShowAs has been "down" while the listener displays the status "at the top. If I choose the option to start the instance of database through Enterprise Manager it says it starts successfully, but the situation remains "low". The host, port, and SID all look great.
  
  I was hoping that if I could solve this problem it would also solve my connection problems remotely...
  
  Does anyone know why this might be happening?
  It doesn't seem to be any errors contained in the alert_log.
  
  Thank you!

  previously you posted the results of
  lsnrctl service

  orasidname. New.domain.Name

  above is the SERVICE_NAME customer requested & he has / does not exist on this server, DB, as shown by the results obtained

  lsnrctl service
  was the closest
  orasidname.old.domain.Name

• What is the best practice for SQL Developer 4.02 on Oracle 10 g TNS connection?

  The basic connection is no problem.  But try a TNS connection gives me error "Test failed: no ocijdbc11 in java.library.path".  I'm not clear on the procedure suggested in the Readme "to connect to an earlier version of the database using the thick driver, you must install a client 11g.  What is the exact procedure to "install a client 11g?

  Thank you!

  What worked to correct "Test failed: no ocijdbc11 in java.library.path" was as follows:

  Tools > Preferences > database > advanced

  'Use Oracle Client' is checked, with access set to Oracle Home path: file:/C:/app/myuserid/product/12.1.0/dbhome_1.

  It worked only after restarting 2 (?).  Claims that as a confirmation, tested in this case it is recommended that a simple solution.  Thanks to Jeff for suggest a way to work the problem.

• Unable to connect to host local browser

  I am new to get a set up local test server.  I thought that I had working at the same time, but I get a connection to my browser failure.

  I checked all the settings:

  The local site folder: C:\wamp\www\SITENAME\

  Server name: server to Test Local

  Connect using: Local/network

  Folder on the server: C:\wamp\www\SITENAME

  WEB url: http://localhost/SITENAME/index.htm

  Model of test server: PHP/MySQL

  They seem to be OK for my novice eyes.

  In the search for a solution, the only thing I've been was to verify that the local server has been started.  Could it be and how do I check it?

  Could explain why it seemed to work, and then stopped.

  Tom

  TCarp wrote:

  WEB url: http://localhost/SITENAME/index.htm

  This should be http://localhost/SITENAME/

  In the search for a solution, the only thing I've been was to verify that the local server has been started.  Could it be and how do I check it?

  Could explain why it seemed to work, and then stopped.

  If the server is not running, it will not work. I don't use WampServer, but a quick glance on the WampServer website shows the menu that access you from the system tray at the bottom right of your screen (see http://www.wampserver.com/en/presentation.php). Try clicking on start all Services.

• Unable to connect to 12 c db running on Linux VM in Windows using InstantClient

  Hello friends,

  I have installed full (standard) db Oracle 12 c successfully under Oracle's Linux, that works as a virtual machine on VirtualBox hosted on my Windows 7 laptop. I am a newbie in Oracle install but am developer PL/SQL for a long time. This installation of db oracle 12 c is for my purposes / learning practice.

  In any case, I got the 12 c running successfully. Listening port is tuned to the db with success. I can connect using sqlplus with success, but ONLY the machine virtual linux. I can't connect from Windows hard drive (I'm a long time of TOAD for oracle user so I will try to connect to the db using InstantClient v12.1). However, after trying several things that I can't connect from the TOAD/Windows/InstantClient DB running inside the virtual machine.

  I allowed deck connection on the virtual machine and has assigned a static (on my router) LAN IP for the virtual machine as 10.0.0.25. My Windows laptop also has a static IP assigned 10.0.0.8 LAN. And I know for sure I can connect the laptop to a web server running on the Linux VM (I have a Docker for Joomla container running inside the virtual machine and can connect to it from my Windows side). And I also added port 1521 in the public/open the port in the firewall... so I don't think that it is a firewall issue.

  However, when I look at the TNS listener logs (/ home/avik/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml) I see it coming when I try on the side Windows any application.

  (Sidenote - the combo of Toad-Instant Client works very well because I also have a XE 11 db g installed on my side Windows and can connect to a test on this XE db schema)

  Here are the details of my installation/server database of 12 c:

  IP address of the server: 10.0.0.25

  SID: orcl

  The global database name: orcl.localdomain

  host name (when the hostname command is run under Linux): localhost.localdomain

  I tried different ways to connect and failed each time. TOAD diagnosed connectivity issues and suggests a few things and I fixed them (such as adding an with the location of the tnsnames.ora TNS_ADMIN environment variable).

  Currently my tnsnames.ora has this article:

  ORCL =

  (DESCRIPTION =

  (ADDRESS = (PROTOCOL = TCP) (HOST = 10.0.0.25)(PORT = 1521))

  (CONNECT_DATA =

  (SERVER = DEDICATED)

  (SERVICE_NAME = orcl.localdomain)

  )

  )

  I tried direct connection (see Fig 1 with parameters) as well by using the TNS names (I think I saw somewhere, so that research on what TNS names will no longer work with Instant Client 12... but I'm not sure). But I always have time. It's as if the listener is not even get all the connections. I probably make a rookie mistake. Any kind soul can help me solve my connectivity problem?

  Fig 1:

  

  Photo 2:

  

  Evidence that the earpiece is working well:

  

  Thank you Ed for your entry.

  Sorry do not provide any error message earlier - basically I was getting error timeout TNS.

  In any case, I've now got to work - while using the bridge connection, which is my preferred method because I intend to bring this virtual machine to another machine (my QNAP NAS server).

  After several days I finally understood the question. Isn't that the listener was listening only on localhost. He could listen to the outbound connections. After using Wireshark to analysis packages and many other trials and errors of this and that, I realized that the Oracle Linux firewall blocking incoming connections on the server. But the strange thing is that I had made an exception in the firewall for the port 1521. And even weirder thing was that on repeated reboot of the server, most of the time my connection was not working (I started using a barebones way to connect - using sqlplus on my windows instead of TOAD) but from time to time without doing anything on the server or touch one thing, I have to work from time to time. So I thought that maybe the startup process was not done to load everything... but most of the time it would not work even after waiting for more than 7-8 minutes after the start and the connection. Eventually, I discovered that the firewall was the issue and all I had to do was to reload the firewall settings which loads the permanent settings (saved), using the following command:
  sudo firewall-cmd - reload

  So this was a quirk of the Oracle Linux (I guess really Red Hat Linux and Oracle Linux is a fork of). After I checked it was the issue, I put it in a startup script and now I have no problem.

  Thanks again for taking the time to share your ideas.

• Unable to connect using string using the user sys Linux linus connection

  Hello
  
  I am facing problem in the use of connection string when you connect as user sys on Linux OS
  
  For example:
  
  When I connect as
  
  sysoracle/sys as sysdba its connection.
  
  But when I provide the connection string as sys/sysoracle@TEST as sysdba its display with the error like:
  
  ORA-12505: TNS: listener is not currently know of SID in connect descriptor
  
  Any help will be benefitial for me
  
  Thanks and greetings

  Save your listener.ora as this with Oracle Home location has changed and that the reboot,

  SID_LIST_LISTENER =
    (SID_LIST =
      (SID_DESC =
        (SID_NAME = PLSExtProc)
        (ORACLE_HOME = E:\oracle\product\10.2.0\db_1)
        (PROGRAM = extproc)
      )
      (SID_DESC =
        (GLOBAL_DBNAME = TEST)
        (ORACLE_HOME = E:\oracle\product\10.2.0\db_1)
        (SID_NAME = TEST)
      )
    )
  
  LISTENER =
    (DESCRIPTION_LIST =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = oracle)(PORT = 1521))
      )
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
      )
    )
  

  HTH
  Aman...