安装RPM包问题

见贴好~！

实验环境：RHEL4.7
-----------------------------------
[root@localhost yum]# rpm -ivh yum_2.4.0-1.centos4_noarch.rpm
warning: yum_2.4.0-1.centos4_noarch.rpm: V3 DSA signature: NOKEY, key ID 443e1821
Preparing... ########################################### [100%]
package yum-2.4.0-1.centos4 is already installed
[root@localhost yum]# rpm -e yum_2.4.0-1.centos4_noarch.rpm
error: package yum_2.4.0-1.centos4_noarch.rpm is not installed
[root@localhost yum]# yum
Traceback (most recent call last):
File "/usr/bin/yum", line 27, in ?
yummain.main(sys.argv[1:])
File "/usr/share/yum-cli/yummain.py", line 67, in main
locale.setlocale(locale.LC_ALL, '')
File "/usr/lib/python2.3/locale.py", line 381, in setlocale
return _setlocale(category, locale)
locale.Error: unsupported locale setting
---------------------------------------------------------
上面代码是在SSH里RPM安装、卸载、运行yum错误提示，有人可以解释下么？
谢谢~~`