“ORACLE

　　今天有時間對ORACLE_HOME環境變量進行了如下測試

　　[oracle@linux ~]$ export ORACLE_HOME=/u/app/oracle//product//db_

　　[oracle@linux ~]$ sqlplus / as sysdba

　　SQL*Plus: Release Production on Mon Jun ::

　　Copyright (c) Oracle  All Rights Reserved

　　Connected to an idle instance

　　SQL> Disconnected

　　[oracle@linux ~]$ export ORACLE_HOME=//u/app/oracle/product//db_

　　[oracle@linux ~]$ sqlplus / as sysdba

　　SQL*Plus: Release Production on Mon Jun ::

　　Copyright (c) Oracle  All Rights Reserved

　　Connected to an idle instance

　　SQL> Disconnected

　　[oracle@linux ~]$ export ORACLE_HOME=/u/app/oracle/product//db_/

　　[oracle@linux ~]$ sqlplus / as sysdba

　　SQL*Plus: Release Production on Mon Jun ::

　　Copyright (c) Oracle  All Rights Reserved

　　Connected to an idle instance

　　SQL> Disconnected

　　[oracle@linux ~]$ export ORACLE_HOME=/u/app/oracle/product//db_

　　[oracle@linux ~]$ sqlplus / as sysdba

　　SQL*Plus: Release Production on Mon Jun ::

　　Copyright (c) Oracle  All Rights Reserved

　　Connected to:

　　Oracle Database g Enterprise Edition Release Production

　　With the Partitioning and Data Mining options

　　SQL>

　　測試結果顯示ORACLE_HOME環境變量中對/符號要求嚴格不能在該字符串變量的值中出現多余/符號（雖然這樣寫在linux下是合法的）否則可能引起連接數據庫異常對於初學者需要提高警惕

From:http://tw.wingwit.com/Article/program/Oracle/201311/16813.html