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Centos7 updates yum source

Table of contents

        • View the current yum source
        • Make a backup
        • Replace local source with Alibaba Cloud Source
        • Clear yum cache and update
        • Install epel source
        • Use the epel source provided by Alibaba open source mirror
        • Clear the system yum cache again and regenerate the new yum cache
        • View new yum source
        • tips

View the current oneyumsource
yum repolist
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rightCentOS- Make a backup
mv /etc// /etc//
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Replace local source with Alibaba Cloud Source
wget -O /etc// /repo/
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Clear yum cache and update
yum clean all
yum makecache
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Install epel source
yum list | grep epel-release 
yum install -y epel-release
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Using AliOpen sourceEpel source provided by mirror
wget -O /etc// /repo/
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Clear the system yum cache again and regenerate the new yum cache
yum clean all
yum makecache
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View new yum source
yum repolist enabled
yum repolist all
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tips

If you keep reporting during the yum makecache:
Another app is currently holding the yum lock; waiting for it to exit…
Don't panic, just enter the following command

rm -f /var/run/
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