On Fri, May 16, 2008 at 6:39 AM, Rick Ricky <ricks12345@xxxxxxxxx> wrote: > now oracle needs my oracle sid. I think my sysadmin changed something. I do > not know what it is. > > when do you need to enter a SID when you log into oracle from a unix/linux > shell and when don't you? > The following 2 variable have a lot to do with this. ORACLE_SID TWO_TASK Set the ORACLE_SID when you are logging onto a database on the local server. ------------------------------------ $ set ORACLE_SID=dv10 $ sqlplus scott/tiger SQL*Plus: Release 9.2.0.8.0 - Production on Fri May 16 11:11:29 2008 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production With the Partitioning option JServer Release 9.2.0.8.0 - Production SQL> ---------------------------------- If the database is on another server, you will need to include the ORACLE_SID in the command line with SQLPLUS This example is on the same server, but the principle is the same $ sqlplus scott/tiger@dv10 SQL*Plus: Release 9.2.0.8.0 - Production on Fri May 16 11:12:27 2008 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production With the Partitioning option JServer Release 9.2.0.8.0 - Production SQL> --------------------------------------------------------- Setting TWO_TASK overrides ORACLE_SID: Here scott will logon to the hrdev server (DEV) rather than dv10, even though no ORACLE_SID was specified on the command line, and ORACLE_SID is set to dv10. $ export TWO_TASK=hrdev $ echo $ORACLE_SID dv10 $ sqlplus scott/tiger SQL*Plus: Release 9.2.0.8.0 - Production on Fri May 16 11:13:50 2008 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production With the Partitioning, OLAP and Oracle Data Mining options JServer Release 9.2.0.6.0 - Production SQL> select * from global_name; GLOBAL_NAME -------------------------------------------------------------------------------- DEV.RADISYS.COM SQL> ------------------------------------------------------------------------------- As to why you can no longer logon to the local database without specifying ORACLE_SID on the command line, there are many possibilities. * the database is no longer on the server * permissions where changed on the oracle executable * something else? Ask the DBA. -- Jared Still Certifiable Oracle DBA and Part Time Perl Evangelist