Tag: linux

Set, verify, and sync your timezone in Ubuntu using timedatectl, one command to fix the clock on a newly provisioned server.

Build a video slideshow from static images with a voiceover track using FFmpeg, concat filters, fade transitions, and audio sync.

mogrify from ImageMagick batch-processes images, resize, convert, compress, and apply effects to entire directories at once.

Generate code documentation with Doxygen without installing it, run it from a Docker container and get HTML docs from any codebase.

RSA SSH keys are aging out. Ed25519 is the modern default: generate one in seconds, secure it with ssh-agent, add FIDO2 hardware keys, and audit legacy keys safely.

Expose Docker's Unix socket over TCP so remote tools and dashboards can connect, daemon.json config for Linux and Windows.

The official, no-nonsense way to install Docker Engine on Ubuntu and Debian, repository setup, key import, and one command to verify it works.

Use su with a specific shell to switch users without the default login shell, useful when /etc/passwd points to something unexpected.

Service restart not showing logs? systemd hides stdout. Learn journalctl, systemctl status, and debugging workflows for silent systemd failures.

Upload an ISO to Proxmox three ways: web UI, wget onto the node, or SCP. Where ISOs live, why browser uploads stall, and how to fix storage with no ISO option.

WebGL disabled or hardware acceleration broken? Force-enable it in Chrome and Firefox with the right flags and about:config tweaks.

Essential bash utilities for Ubuntu newcomers, file management, text processing, process control, and the commands you'll type every day.