centos7.4出現yum command not found


購買的雲服務器運行yum命令出現yum command not found。

通過將雲主機自帶的yum和python卸載掉,並且同時需要關注/usr/bin/yum文件的首行解釋。我定義其為"#!/usr/bin/python"

1.卸載python:

1 rpm -qa|grep python|xargs rpm -e --allmatches --nodeps
2 whereis python|xargs rm -fr

2.卸載yum:

1 rpm -qa|grep yum|xargs rpm -e --allmatches --nodeps
2 rm -rf /etc/yum.repos.d/*
3 whereis yum|xargs rm -fr

3.創建目錄python和yum用以存放rpm包:

1 mkdir /usr/local/src/python
2 mkdir /usr/local/src/yum

4.使用wget分別下載python以及yum的rpm包(注意:一定要和系統的版本號對應)

    (1)下載python的rpm包:

1 #cd /usr/local/src/python 進入目錄
2 
3 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-2.7.5-34.el7.x86_64.rpm
4 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
5 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-pycurl-7.19.0-17.el7.x86_64.rpm
6 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-devel-2.7.5-34.el7.x86_64.rpm
7 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-libs-2.7.5-34.el7.x86_64.rpm
8 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-urlgrabber-3.10-7.el7.noarch.rpm
9 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/rpm-python-4.11.3-17.el7.x86_64.rpm

    (2)下載yum的rpm包:

1 #cd /usr/local/src/yum 
2 
3 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-3.4.3-132.el7.centos.0.1.noarch.rpm
4 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
5 #wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm

 


5.安裝python以及yum的rpm包

(1)安裝python:

1 #cd /usr/local/src/python 
2 
3 #rpm -ivh python-* rpm-python-* 
4   出現安裝包的依賴問題,此時如下解決即可:
5 
6 #rpm -ivh python-* rpm-python-* --nodeps --force
7             --nodeps --force為不考慮依賴包,強制安裝。
8 
9             安裝完后即可運行python:

 (2)安裝yum:

1 #cd /usr/local/src/yum 
2 #rpm -ivh yum-* 

 


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