linuxize.com

Select all text in Vim with ggVG, yank every line with :%y, copy the whole file to the system clipboard, or delete all lines with :%d. No plugins required.

SPF, DKIM, and DMARC help prevent domain spoofing. See how each check works, what DMARC alignment requires, and how to verify the DNS records with dig.

Quick reference for generating and verifying SHA-256 and MD5 checksums with sha256sum, md5sum, and related Linux hash commands ...

stdin, stdout, and stderr are Linux's three standard streams. See how file descriptors 0, 1, and 2 connect commands to terminals, files, and pipes.

Configure Ubuntu networking with Netplan using practical YAML examples for DHCP, static IP addresses, DNS, Wi-Fi, bridges, and safe remote changes.

Docker Compose quick reference: lifecycle commands, Compose file directives, health checks, environment variables, profiles, scaling, and cleanup.

The tree command lists directories recursively as an indented tree. This guide covers installation, depth limits, filtering, sizes, and saving the output.

Encrypt files with GPG using a passphrase or a key pair, share encrypted files with other people, protect whole directories, and decrypt safely in scripts.

Use the strace command to trace system calls and signals on Linux, debug why a program fails, find missing files, and measure where a process spends its time.

How to install PM2, run and manage Node.js processes with clustering, zero-downtime reloads, log rotation, and systemd integration that survives reboots.