CentOS 透過 yum 自動安裝”安全性”修正更新

參考安裝步驟:
http://alvinalexander.com/linux-unix/centos-yum-installing-only-security-updates

# install the security plugin
yum -y install yum-plugin-security

# display all security-related updates
yum --security check-update

# list all bugs fixed
yum updateinfo list bugzillas

# summary of advisories
yum updateinfo summary

# upgrade all packages with security info to latest available package
yum --security update

# upgrade all packages with security info to last security update
# (as opposed to the latest possible update)
yum --security update-minimal

# help
man 8 yum-security