Comments 1 Posted In Red Hat Enterprise Linux RHEL7.5 auto-installed security update without awareness Latest response 2021-07-30T13:46:38+00:00 My VM installed security updates a while ago without notice. Yum-cron is not configured. Would like to find what, who and when the security update was installed. Started 2021-07-30T01:14:15+00:00 by Leon Zhang Newbie 11 points Log in to join the conversation Responses Sort By Oldest Sort By Newest SM Guru 7011 points 30 July 2021 1:46 PM Sadashiva Murthy M Hello Leon Zhang, If you wish to understand and know more details about when was a package or group of packages got installed then check using "yum history" command. This shows a list of all yum transactions that occurred. If you wish to know more details about any transaction then trigger the "yum history info " command. This would tell you what command was run in that particular transaction, what packages are installed/updated and date/time of the transaction etc,. If the system is controlled or managed by a life cycle management tool such as Satellite then possibility is that those updates could have been pushed by it. Otherwise, an infra tool such as Ansible could also do that. Hope this helps!