Tech Couch

Managing users on linux

A guide on users, groups and authentication

Brute-forcing logins with hydra: Attack and defense

How an attacker would crack a login, and how to protect against it

A Practical Guide to Linux Disk Encryption

Keeping disk contents safe from prying eyes

Editing files with nano

Terminal file-editing made easy

Understanding bash stream redirection

Controlling the flow of data in and out of programs

Working with tar archives

...and tar.gz, tar.bz2 and tar.xz

Understanding the linux tee command

Copying stdin to multiple outputs

Protecting linux servers from malware with ClamAV and rkhunter

Finding malicious files the open source way

Scheduled background tasks with cron

Getting things done automatically

Setting up an nginx load balancer

Distributing requests to multiple servers