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2026

Oct 06Using Ansible check mode as a nightly drift detector
Oct 05Catching interface flaps with EEM before users open tickets
Oct 02Alerting on silence: catching the metrics that stop arriving
Oct 02Weekly recap: control planes, container runtimes and the appliances we forget
Sep 29Stop cron jobs from stepping on each other with flock and trap
Sep 28Sub-second OSPF failover with BFD on IOS-XE
Sep 25Alerting on metrics that stop existing
Sep 25Weekly recap: kernel root exploits, ISE and switch flaws, and a record patch month
Sep 23The sudoers rules that quietly hand out root
Sep 22When ansible check mode lies to you
Sep 21Stopping a volumetric flood with RTBH before your upstream picks up the phone
Sep 18Alerting on silence, not just on thresholds
Sep 18Edge Devices And Build Pipelines Took The Week's Damage
Sep 17Stop letting journald eat your root filesystem
Sep 16Retiring authorized_keys with an SSH certificate authority
Sep 15Your Playbook Is Not Idempotent And You Already Know It
Sep 14Draining a border router without dropping traffic
Sep 11Alert rules that survive contact with a real on-call rotation
Sep 11Weekly recap: edge VPN patches, a poisoned artifact store, and a kernel branch that quietly died
Sep 10A read-only MCP server for network devices
Sep 10Stop letting the kernel OOM killer pick your victims
Sep 09The one-page AI usage policy, and the survey you should send first
Sep 09Replacing authorized_keys with an SSH certificate authority
Sep 08When your Ansible network playbook silently ignores group_vars
Sep 07Stop the bleeding with RTBH before you open the ticket
Sep 04Your alert did not fire because the metric disappeared
Sep 04Weekly Recap: A Bgp Hijack In The Supply Chain, Eight Stable Kernels, And Agent Guardrails
Sep 03Detecting firewall rule drift before your auditor does
Sep 02Hardening the services you forgot you were running
Sep 02Verifying Cron-Driven Publishing with a Guard Script

2024

Nov 15zsh & vimrc file

2023

Dec 01Juniper commands
Nov 30Journalctl commands

2022

Sep 02FHRP
Aug 31ntp and CA
Jun 30GLBP
Jun 30hardening
Jun 30hsrp
Jun 30vrf
Apr 28redir
Apr 25Cisco commands
Apr 21database stuff
Apr 21proxmox
Apr 20ssh stuff
Apr 20systemctl and journalctl
Feb 02vagrant and ansible

2021

2020

Jul 05markdown cheat sheet
Jan 07install script

2019

Oct 22sec service
Sep 16linux dhcp config
Aug 01Welcome

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