Linux下oracle显示乱码解决

1.登录oracle用户，登录dba,显示乱码？？？

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[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"