1、
vim $ORACLE_HOME/sqlplus/admin/glogin.sql
在最后加上set sqlprompt "_user'@'_connect_identifier> "
进入sqlplus变成
[oracle@rac1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Tue Jul 15 11:37:12 2014
Copyright (c) 1982, 2009, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SYS@center> 

2、
[root@rac1 src]# rpm -ivh rlwrap-0.37-1.el5.x86_64.rpm 
warning: rlwrap-0.37-1.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 217521f6
Preparing...                ########################################### [100%]
   1:rlwrap                 ########################################### [100%]

vim .bash_profile
在最后加上