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sudo yum install yum-cron

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sudo systemctl start yum-cron
sudo systemctl enable yum-cron

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sudo vi /etc/yum/yum-cron.conf

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apply_updates = yes  # ÆôÓÃ×Ô¶¯¸üÐÂ
update_cmd = default  # ĬÈÏʹÓÃyumÏÂÁî¾ÙÐиüÐÂ
random_sleep = 360  # Ëæ»úÑÓ³Ùʱ¼ä£¨µ¥Î»ÎªÃ룩

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sudo vi /etc/cron.daily/0yum-daily.cron

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#!/bin/bash
exec /usr/bin/yum --security -R 120 -e 0 -d 0 -y update

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sudo yum update --security

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yum-cronЧÀÍ»áÌìÉú¸üÐÂÈÕÖ¾£¬ÎÒÃÇ¿ÉÒÔͨ¹ýÉó²é¸üÐÂÈÕÖ¾À´¼à¿ØϵͳµÄ¸üÐÂÇéÐΡ£

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sudo less /var/log/yum.log

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https://access.redhat.com/solutions/10021

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