1.登录oracle用户，登录dba,显示乱码？？？
[root@redhat4 ~]# su - oracle
[oracle@redhat4 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Jul 22 18:27:40 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
???:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL> exit
[oracle@redhat4 ~]$ echo $NLS_LANG //查看当前语言，返回为空
[oracle@redhat4 ~]$ pwd
/home/oracle
[oracle@redhat4 ~]$ cat .bash_profile //查看bash_profile文件
# .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
unset USERNAME
ORACLE_BASE=/u01/app/oracle
export ORACLE_BASE
ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1
export ORACLE_HOME
ORACLE_SID=jiagulun
export ORACLE_SID
PATH=$PATH:$HOME/bin:$ORACLE_HOME/bin
[oracle@redhat4 ~]$ vi .bash_profile //编号并添加如下2行：
export LANG=en_US.UTF-8
export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK
[oracle@redhat4 ~]$ exit //退出再登录oracle用户
logout
[root@redhat4 ~]# su - oracle
[oracle@redhat4 ~]$ sqlplus / as sysdba //显示正常无???
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Jul 22 18:33:14 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL> show user;
USER is "SYS"
本文出自 “放开去博、活出精彩！” 博客，请务必保留此出处http://ibmcn.blog.51cto.com/510174/1441865