Yum update only security-related packages

yum -y install yum-plugin-security

# To display all updates that are security relevant, and get a reutrn code on whether there are security updates enter:
yum --security check-update

# To upgrade packages that have security errata (upgrades to the latest available package) use:
yum --security update

# To upgrade packages that have security errata (upgrades to the last security errata package) use:
yum --security update-minimal

# See yum-security man page for more information:
man 8 yum-security

thanks, cyberciti

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