centos系统删除用yum安装的软件

yum安装软件包,方便简单.但在这个过程中,那些文件和目录都到哪里去了呢?yum install
mysql.现在要重新安装mysql,因此需要把yum方式安装的mysql删除.

用rpm工具吧,不行呢.挨个删除文件,更不可行,因为我不知道究竟安装了哪些文件,都存放在哪些位置.怎么办?还好,yum自己可以完成这个工作.

现在我们来看一下yum的参数:
[root@test1 ~]# yum

You need to give some command

usage: yum [options] < grouplist, localinstall,
groupinfo, localupdate, resolvedep, erase, deplist, groupremove,
makecache, upgrade, provides, shell, install, whatprovides,
groupinstall, update, repolist, groupupdate, info, search,
check-update, list, remove, clean, grouperase
>
其中remove就是删除命令.好了,我们来执行命令 yum remove
mysql ,其输出如下:
[root@test1 ~]# yum remove mysql

Setting up Remove Process

base
100% |=========================| 1.1
kB
00:00

updates
100% |=========================| 951
B
00:00

addons
100% |=========================| 951
B
00:00

extras
100% |=========================| 1.1
kB
00:00

Resolving Dependencies

--> Running transaction check

---> Package mysql.i386 0:5.0.45-7.el5 set to be
erased

--> Processing Dependency: libmysqlclient.so.15 for
package: mysql-devel

--> Processing Dependency: libmysqlclient_r.so.15
for package: mysql-devel

--> Processing Dependency: mysql = 5.0.45-7.el5 for
package: mysql-devel

--> Running transaction check

---> Package mysql-devel.i386 0:5.0.45-7.el5 set to
be erased

--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================

Package
Arch
Version
Repository
Size

=============================================================================

Removing:

mysql
i386
5.0.45-7.el5
installed
7.3 M

Removing for dependencies:

mysql-devel
i386
5.0.45-7.el5
installed
5.6 M
Transaction Summary

=============================================================================

Install
0
Package(s)

Update
0
Package(s)

Remove
2
Package(s)
Is this ok [y/N]: y

Downloading Packages:

Running rpm_check_debug

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

Erasing :
mysql-devel
######################### [1/2]

Erasing :
mysql
######################### [2/2]
Removed: mysql.i386 0:5.0.45-7.el5

Dependency Removed: mysql-devel.i386 0:5.0.45-7.el5

Complete!
看,很容易就完成了.再来验证一下:
执行命令mysql,其结果为:
[root@test1 ~]# mysql

-bash: mysql: command not found
果然删除了!