While upgrading your Debian Stretch, you can come up with this message :
W: Possible missing firmware /lib/firmware/i915/kbl_huc_ver02_00_1810.bin for module i915
W: Possible missing firmware /lib/firmware/i915/bxt_huc_ver01_07_1398.bin for module i915
W: Possible missing firmware /lib/firmware/i915/skl_huc_ver01_07_1398.bin for module i915
This has been referenced as a bug :
If you can’t upgrade to Debian Buster, there is a possible workaround
Otherwise, after switching to Buster, the available version of firmware-misc-nonfree provides the missing firmwares.
At boot time, the following message can pop up :
WARNING : Failed to connect to lvmetad. Falling back to device scanning
This message is displayed, whether running Debian stable or Debian testing.
To get rid of this message, disable lvmetad in /etc/lvm/lvm.conf
Update the initramfs for the current kernel your system uses :
update-initramfs -k $(uname -r) -u; sync
Reboot your system and you’re done !
Ubuntu workaround for this issue
This issue has already been reported in the Debian bug tracking system : #846946
A quick tip to know when a service was restarted for the last time :
ps -p service_process_id -o lstart
/var/log/messages can have some details as well :
grep service_name /var/log/messages
yum-security is a plugin to the Red Hat Entreprise Linux package manager yum. It helps installing only security updates (RHSA) (as opposed to bug fixes (RHBA) or enhancements (RHEA)).
Explanation of RHSA, RHBA and RHEA advisories
RHEL 7 : yum-security is part of yum
RHEL 6 :
yum install yum-plugin-security
List all available erratas without installing them :
yum updateinfo list available
List all available security updates without installing them :
yum updateinfo list security all
yum updateinfo list sec
List of the currently installed security updates :
yum updateinfo list security installed
More examples are available in this Red Hat KB article
Red Hat has been provided security information since January 2005 through different ways :
RHSA-Announce mailing list, Red Hat CVE database and Red Hat Product Errata
For a better access of their data, the Red Hat Product Security has just released a beta API. It provides more search options for accessing real-time data.
More details can be found in the post below :
Red Hat Security Blog post about their new Security Data API service
RedHat Security Data API
Two links for an in-depth explanation regarding Red Hat backporting security fixes process as well as compatibility between Red Hat security advisories and Mitre CVEs.
Backporting Security Fixes
Red Hat and CVE compatibility
Red Hat provides free access to two databases for errata and for CVE referenced in Red Hat products :
Red Hat Product Errata database
Red Hat CVE Database