Deep dives, practical guides, and incident analyses from engineers who build Safeguard. No fluff, no vendor FUD — just what you need to ship secure software.
Light ejects electrons from a metal only above a threshold frequency: K = hf minus φ. History, Millikan's test, the 2019 SI and five worked examples.
Keep three copies on two media with one offsite, using encrypted, deduplicated restic or Borg repos, an append-only remote and monthly restore drills.
Proxmox VE is a Debian based KVM and LXC hypervisor. Learn quorum, QDevice, ZFS and Ceph storage, encrypted backups, updates and how to lock it down.
TianoCore EDK II is the open source UEFI reference code many firmware vendors build on. Learn its boot phases, packages, OVMF, security and update path.
An OS cannot probe most on-board hardware, so firmware describes it: Devicetree on many Arm and embedded boards, ACPI tables and AML on PCs and servers.
SLES 10 to 16, Leap 15 and 16, Tumbleweed and Slowroll: release dates, support end dates, how OBS and openQA gate builds, and how to patch and roll back.
Arch Linux has no versions to support: one rolling repository, a dated ISO each month. Its history, the pacman keyring, archinstall and rollback explained.
BGP Flowspec carries firewall-style match rules and actions in BGP. How rules are encoded, validated and ordered, and how to keep a bad rule contained.
BFD tells routers in milliseconds that a forwarding path has failed. How sessions form, how detection time is set, the modes, and how to authenticate it.
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