卸载linux自带的httpd服务：

方法一：

#rpm -e httpd

结果，出现以下错误

httpd-mmn = 20020628 is needed by (installed) mod_perl-1.99_07-5

httpd-mmn = 20020628 is needed by (installed) mod_python-3.0.1-3

httpd-mmn = 20020628 is needed by (installed) mod_ssl-2.0.40-21

httpd-mmn = 20020628 is needed by (installed) php-4.2.2-17

libapr.so.0 is needed by (installed) mod_perl-1.99_07-5

libaprutil.so.0 is needed by (installed) mod_perl-1.99_07-5

webserver is needed by (installed) webalizer-2.01_10-11

httpd >= 2.0.40 is needed by (installed) mod_perl-1.99_07-5

httpd >= 2.0.40 is needed by (installed) mod_python-3.0.1-3

httpd is needed by (installed) mod_ssl-2.0.40-21

要卸载这些东西还应该卸载它的依赖包，于是

#rpm -e mod_ssl

#rpm -e mod_python

#rpm -e mod_perl

#rpm -e webalizer

把所有的依赖包都卸载后

再次 #rpm -e httpd 成功！

方法二：

#rpm -e httpd --nodeps可以不用卸载这些依赖包

原文：http://www.cnblogs.com/tdcqma/p/5038023.html