#############오류 내용#######################
bash-2.05$ sqlplus cloud/패스워드
SQL*Plus: Release 8.1.7.0.0 - Production on 월 Jul 31 15:51:43 2006
(c) Copyright 2000 Oracle Corporation. All rights reserved.

ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
SVR4 Error: 2: No such file or director

###잘못된 환경설정내용#########

bash-2.05$ set|grep ORACLE
ORACLE_BASE=/home/oracle
ORACLE_HOME=/home/oracle
ORACLE_OWNER=oracle
ORACLE_SID=RUSH
bash-2.05$

아래와 같이 환경설정을 수정하였다.

export ORACLE_BASE=/home/oracle/
export ORACLE_HOME=/home/oracle/