Linux6 min read
Vim survival guide for Linux admins
The minimum vim knowledge you need to survive on a Linux server. Editing config files without wanting to throw your keyboard.
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Linux7 min read
Linux memory management: free, vmstat, and /proc
Understanding how Linux uses memory. Reading free correctly, using vmstat, and what /proc/meminfo actually tells you.
Linux6 min read
tmux: terminal multiplexing made simple
Using tmux to manage terminal sessions. Panes, windows, and why your SSH sessions should survive disconnects.
Linux6 min read
Managing SSL certificates with Let's Encrypt
Getting free SSL certificates with Let's Encrypt and certbot. Installation, renewal, and troubleshooting.
Linux8 min read
Nginx basics: serving static content
Setting up Nginx as a static file server and reverse proxy. Configuration basics, virtual hosts, and performance tuning.
Linux7 min read
Setting up Apache on Ubuntu
Installing and configuring Apache. Virtual hosts, .htaccess, modules, and the settings you'll want to change.
Linux5 min read
Time synchronization with NTP
Keeping Linux clocks accurate with chrony and systemd-timesyncd. Why time matters and how to configure it.
Linux7 min read
Tuning Linux kernel parameters with sysctl
Runtime kernel tuning with sysctl. Network performance, memory management, and security hardening parameters.
Linux7 min read
Understanding PAM authentication
How Linux authentication works under the hood. PAM modules, configuration files, and common customizations.
Linux7 min read
rsync: the Swiss Army knife of file sync
Copying files efficiently with rsync. Local and remote sync, incremental backups, and the flags you'll actually use.