1，刪除注冊和訂閱提示
查找subscription-manager相關組件:
rpm -qa | grep subscription-manager
刪除subscription-maanager相關組件:
sudo yum remove subscription-manager
查找rhn相關組件
rpm -qa | grep rhn
刪除rhn相關組件:
sudo yum remove rhn-check
2,yum 安裝
查詢當前RHEL7.0的yum安裝包:
rpm -qa |grep yum
強制刪除當前yum:
rpm -qa|grep yum|xargs rpm -e --nodeps
再次查詢yum是否刪除:
rpm -qa |grep yum
3.解決wget無法解析DNS問題
解決方法：
a.進入/etc/resolv.conf
b.修改或增加內容：
nameserver 8.8.8.8
4.下載所需的安裝包
http://mirrors.163.com/centos/7/os/x86_64/Packages/
ctrl + f搜索需要的 安裝包
yum-plugin-fastestmirror
yum-updateonboot
yum-utils
yum-metadata-parser
yum-3.4.3-163.el7.centos.noarch.rpm
5.安裝
1 rpm -ivh yum-*
2 #報錯，依賴包版本不符：
3 python-urlgrabber >= 3.10-8 被 yum-3.4.3-163.el7.centos.noarch 需要 4 rpm >= 0:4.11.3-22 被 yum-3.4.3-163.el7.centos.noarch 需要
解決方法：升級
1 wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm 2 wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm 3 #如果下載不了，鏈接過期了，自己去網易官網搜索，下載到本地，安裝
4 #安裝
5 rpm -Uvh yum-3.4.3-163.el7.centos.noarch.rpm --nodeps 6 rpm -Uvh python-urlgrabber-3.10-9.el7.noarch.rpm
重新安裝其他安裝包
rpm -ivh yum-*
6.更新yum源
1 rm /etc/yum.repos.d/redhat.repo 2 vim /etc/yum.repos.d/CentOS-Base.repo 3 # 內容:
4
5 [base] 6 name=CentOS-$7 - Base - 163.com 7 #mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=os
8 baseurl=http://mirrors.163.com/centos/7/os/$basearch/
9 gpgcheck=1
10 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
11 #released updates
12 [updates] 13 name=CentOS-$7 - Updates - 163.com 14 #mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=updates
15 baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
16 gpgcheck=1
17 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
18 #additional packages that may be useful
19 [extras] 20 name=CentOS-$7 - Extras - 163.com 21 #mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=extras
22 baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
23 gpgcheck=1
24 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
25 #additional packages that extend functionality of existing packages
26 [centosplus] 27 name=CentOS-$7 - Plus - 163.com 28 baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/
29 gpgcheck=1
30 enabled=0 31 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
清空yum緩存
yum clean all
生成緩存
yum makecache
更新成功
1 yum install tree
2 tree
