升级bash，但bash --version没有变化，为什么

Question

对于Shellshock问题 我在redhat 4,5上升级bash使用以下步骤

1. 检查bash版本

   root@aaaA:/usr/src/redhat/RPMS/x86_64>bash --version GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc.

2. 升级bash

   rpmbuild --rebuild -bb bash-3.2-33.el5_11.4.src.rpm
cd /usr/src/redhat/RPMS/x86_64/
root@aaa:/usr/src/redhat/RPMS/x86_64>rpm -Uvh bash-* Preparing... ########################################### [100%] 1:bash ########################################### [ 50%] 2:bash-debuginfo ########################################### [100%]

3. 再次检查bash版本

root@aaa:/usr/src/redhat/RPMS/x86_64>bash --version GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc.

1. 重新启动并再次检查bash版本

root@aaa:/usr/src/redhat/RPMS/x86_64>bash --version GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc.

1. check rpm

root@aaa:/usr/src/redhat/RPMS/x86_64>rpm -qa | grep bash bash-3.2-33.4 bash-debuginfo-3.2-33.4

为什么bash版本没有改变为bash-3.2-33.4