Blog
Practical, command-level guides for system administrators and DevOps engineers — Linux, networking, containers, cloud, databases, virtualization and telecom.
Topics
Network Protocols0
TCP/IP, DNS, HTTP, TLS, BGP, OSPF and the protocols the internet runs on.
Linux & Sysadmin0
Red Hat, systemd, networking, storage, performance, firewalls and shell scripting.
Docker & Kubernetes1
Images, Compose, pods, services, ingress, storage and day-2 operations.
DevOps & CI/CD0
Jenkins, Ansible, Terraform, Git and release engineering.
Python0
Automation, CLI tooling, packaging and scripting for operations.
Cloud & AWS0
VPC, EC2, S3, RDS, ECS, Route 53, cost, architecture and disaster recovery.
Databases & Caching0
MySQL/MariaDB tuning, backups, replication and Redis.
Web & Mail Servers0
Nginx, Apache, Postfix, Zimbra and email authentication (SPF, DKIM, DMARC).
Virtualization0
KVM, libvirt, oVirt, live migration and certificate renewal.
Monitoring0
Nagios checks, plugins, alerting and reducing alert fatigue.
Telecom Systems0
SS7 and SIGTRAN, SIP, SMPP, USSD, SMSC, Asterisk and core telco architecture.