CentOS7误操作卸载python导致python和yum都不可使用解决方案

1.创建目录python和yum用以存放rpm包：

1. #mkdir /usr/local/src/python

2. #mkdir /usr/local/src/yum

2.使用wget分别下载python以及yum的rpm包（注意：一定要和系统的版本号对应）地址：http://vault.centos.org

    （1）下载python的rpm包：

1. #cd /usr/local/src/python 进入目录

2. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-2.7.5-34.el7.x86_64.rpm

3. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm

4. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-pycurl-7.19.0-17.el7.x86_64.rpm

5. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-devel-2.7.5-34.el7.x86_64.rpm

6. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-libs-2.7.5-34.el7.x86_64.rpm

7. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-urlgrabber-3.10-7.el7.noarch.rpm

8. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/rpm-python-4.11.3-17.el7.x86_64.rpm

    （2）下载yum的rpm包：

1. #cd /usr/local/src/yum

2. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-3.4.3-132.el7.centos.0.1.noarch.rpm

3. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

4. #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm

3.安装python以及yum的rpm包

    （1）安装python:

#rpm -ivh python-*   rpm-python-* --nodeps --force

            --nodeps --force为不考虑依赖包，强制安装。

    （2）安装yum:

1. #cd /usr/local/src/yum

2. #rpm -ivh yum-*

        至此yum重新安装成功