Posts
Page 59 of 66
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APT: Upgrade a Single Package, Not Everything
Upgrade one package with apt and leave the rest alone. The exact flag, why apt upgrade nginx does not work, version pinning, and held package behaviour.
· Updated:6 min read -
Certificate Pinning: A Secure Connection Guide
Certificate pinning locks your app to a specific TLS cert so MITM attackers can't swap in a rogue CA, how it works and when to use it.
7 min read -
Docker Networking Essential Guide for All Skill Levels
Bridge, host, overlay, macvlan, and none, every Docker network mode explained with real use cases from beginner to production.
8 min read -
Docker Volume Mounts: Essential Flags
The -v and --mount flags for Docker volumes explained, bind mounts vs named volumes, read-only, propagation, and tmpfs options.
· Updated:6 min read -
How to Transfer docker Images Without a Repository
Move Docker images between hosts without a registry using docker save and docker load, air-gapped deployments made simple.
· Updated:6 min read -
Understanding CMD and ENTRYPOINT in Dockerfiles
CMD and ENTRYPOINT both define what runs in a container but work differently, exec vs shell form, and how they interact when combined.
8 min read -
Copying Files Between Docker Containers and Host Machines
Use docker cp to move files between running containers and your host machine, no volumes needed for one-off file transfers.
5 min read -
Dockerfile: Differences Between COPY and ADD
COPY and ADD look similar but ADD auto-extracts tarballs and fetches URLs, know when each is appropriate and why COPY is usually better.
· Updated:6 min read -
Docker Strategies for Load Balancing and Failover
Add load balancing and failover to your Docker setup using Swarm, nginx, HAProxy, and Keepalived, high availability without Kubernetes.
· Updated:6 min read -
Docker Networking: Connecting to the Host from a Container
Access services on the host machine from inside a Docker container using host-gateway or host.docker.internal, no hardcoded IPs.
· Updated:5 min read -
Understanding Docker vs. Full Virtual Machines (VMs)
Containers share the kernel; VMs have their own. Understand the isolation trade-offs, overhead differences, and when to use which.
· Updated:7 min read -
Understanding the regreSSHion Vulnerability in OpenSSH
regreSSHion (CVE-2024-6387) is a remote code execution bug in OpenSSH, what it is, which versions are affected, and how to patch fast.
5 min read
