centos7.5误删python2.7之后，导致yum和Pythonm命令无法使用

快来打我* 2022-08-29 05:46 156阅读 0赞

最近想要将服务器上的Python2.7升级成3.x的版本时。使用了如下命令：

1.  （1）强制删除已安装python及其关联
2.  \# rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps
3.  
4.  （2）删除残余文件
5.  \# whereis python|xargs rm -frv

执行命令后导致服务器上的yum命令和python命令都无法使用。出现以下报错：

1.  \[root@test ~\]\# python -V
2.  \-bash: /usr/bin/python: No such file or directory
3.  
4.  \[root@test ~\]\# yum
5.  \-bash: /usr/bin/yum: No such file or directory

**解决方案**

**1.创建目录用来存放[rpm][]包：**

1.  mkdir /usr/local/src/python

**查看系统版本：**

1.  lsb\_release -a

![fb19548ab43b3d4ec85173ebc02d85f2.png][]

**查看位数**

1.  getconf LONG\_BIT

2.**进入目录，使用wget分别下载python以及yum的rpm包**

[http://vault.centos.org/][http_vault.centos.org] 这个地址可以下载不同版本系统对应的包（**注意：一定要和系统的版本号对应**）

可以看到我们的系统版本是7.5.1804，这里下载以下文件

1.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/lvm2-python-libs-2.02.177-4.el7.x86\_64.rpm
2.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/libxml2-python-2.9.1-6.el7\_2.3.x86\_64.rpm
3.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-libs-2.7.5-68.el7.x86\_64.rpm
4.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-ipaddress-1.0.16-2.el7.noarch.rpm
5.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-backports-1.0-8.el7.x86\_64.rpm
6.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-backports-ssl\_match\_hostname-3.5.0.1-1.el7.noarch.rpm
7.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-2.7.5-68.el7.x86\_64.rpm
8.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
9.  wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-pycurl-7.19.0-19.el7.x86\_64.rpm
10. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-urlgrabber-3.10-8.el7.noarch.rpm
11. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-setuptools-0.9.8-7.el7.noarch.rpm
12. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-kitchen-1.1.1-5.el7.noarch.rpm
13. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/python-chardet-2.2.1-1.el7\_1.noarch.rpm
14. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/rpm-python-4.11.3-32.el7.x86\_64.rpm
15. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/yum-utils-1.1.31-45.el7.noarch.rpm
16. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/yum-3.4.3-158.el7.centos.noarch.rpm
17. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86\_64.rpm
18. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/yum-plugin-aliases-1.1.31-45.el7.noarch.rpm
19. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/yum-plugin-protectbase-1.1.31-45.el7.noarch.rpm
20. wget http://vault.centos.org/7.5.1804/os/x86\_64/Packages/yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm

**3.执行以下命令，开始安装**

1.  rpm -Uvh --replacepkgs lvm2-python-libs\*.rpm --nodeps --force
2.  
3.  rpm -Uvh --replacepkgs libxml2-python\*.rpm --nodeps --force
4.  
5.  rpm -Uvh --replacepkgs python\*.rpm --nodeps --force
6.  
7.  rpm -Uvh --replacepkgs rpm-python\*.rpm yum\*.rpm --nodeps --force

说明：--nodeps --force表示仅安装当前的，不考虑安装所需的依赖

**4.测试python是否可用**

![1cbeba7335b3eafaa2991e08daa8f708.png][]

python命令正常

**5.测试yum是否可用**

![beac5df7b3369fe2cf05a21dbace3519.png][]

yum命令正常

[rpm]: https://www.baidu.com/s?wd=rpm&tn=24004469_oem_dg&rsv_dl=gh_pl_sl_csd
[fb19548ab43b3d4ec85173ebc02d85f2.png]: /images/20220829/308f5859f56549aba127f8ea7c385ded.png
[http_vault.centos.org]: http://vault.centos.org/
[1cbeba7335b3eafaa2991e08daa8f708.png]: /images/20220829/035e98f609364bd7ac27385f16ffbd4f.png
[beac5df7b3369fe2cf05a21dbace3519.png]: /images/20220829/74147c6ca6454fb1891b965ce174198a.png