今天登录一台服务器用roote用户登录的,在切换到oracle用户，执行sqlplus sys/ as sysdba进入数据库提示如下错误：
SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory
在/home/oracle目录下查看文件.bash_profile，它是隐藏文件。
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$
cat
.bash_profile
# .bash_profile
# Get the aliases and functions
if
[ -f ~/.bashrc ];
then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME
/bin
export
PATH
export
ORACLE_BASE=
/u01/app/oracle
export
ORACLE_HOME=
/u01/app/oracle/product/11
.1.0
/db_1
export
ORACLE_SID=orcl
export
PATH=$ORACLE_HOME
/bin
:$PATH
export
LD_LIBRARY_PATH=$ORACLE_HOME
/lib
LANG=zh_CN.UTF-8;
export
LANG
NLS_LANG=
'SIMPLIFIED CHINESE_CHINA.AL32UTF8'
;
export
NLS_LANG
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[oracle@localhost ~]cdORACLE_HOME
-bash: cd: /u01/app/oracle/product/11.1.0/db_1: 没有那个文件或目录
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发现oracle安装定义的家目录是在/u01/app/oracle/product/11.1.0/db_1目录下的
u01目录是root用户的权限，在切回到root用户，执行如下命令：
[root@localhost ~]# cd $ORACLE_HOME
[root@localhost dbhome_1]# pwd
/u01/app/oracle/product/11.2.0/dbhome_1
[root@localhost dbhome_1]# sqlplus / as sysdba
或是
[root@localhost dbhome_1]# cd bin
[root@localhost dbhome_1]# pwd
/u01/app/oracle/product/11.2.0/dbhome_1/bin
[root@localhost bin]# ./sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Thu Oct 12 17:20:48 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Enter password:
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>
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问题解决！
本文转自ling118 51CTO博客，原文链接：http://blog.51cto.com/meiling/1971801，如需转载请自行联系原作者
