Oracle: ORA-01078 and LRM-00109 Error

Environment Description:
Operating System: RedHat 5.3 64bit
Oracle version: 10.2.0.1 SID: search6

After the database is installed today, after you create a database through dbca, the following error is reported during the time when you start and close the database through sqlplus:
SQL> startup
ORA-01078: failure in processing system parameters
LRM-00109: cocould not open parameter file '/app/soft/ora10g/product/10.2.0/db_1/dbs/initsearch. ora'
···
SQL> shutdown immediate
A ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory

At the beginning, no problem was found in alert. log, and the database was logged on normally. After a long query, no problem was found. Later I suddenly remembered that the configuration document in. bash_profile was copied directly from the previous configuration document, which may be due to a problem in this configuration. This is true. bash_profile wrote the SID wrong.
[Oracle @ szmlvm29-54 ~] $ Cat. bash_profile
#. Bash_profile
······
Export ORACLE_SID = search # the correct one is search6
······

So, when you encounter this problem again, you also need to check whether the SID of the configuration document is accurate.

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Troubleshooting for ORA-01078 and LRM-00109