Build and dev tooling
Maven
Everyday commands
Text-processing tools at a glance: grep searches for matching strings, sed
Kernel
Compile the Linux kernel
Networking
Addresses and ports
Package management
Debian and Ubuntu. apt is the command intended for interactive use; apt-get
SSH
Server
Storage and memory
Disk usage
System
Notes target Debian and Ubuntu. Other distributions differ, mainly in the
TLS and Certbot
Certbot / Let's Encrypt
Tools
Suggest to install.
Users and permissions
Users and groups
Virtualization and containers
Docker