The journal as evidence

Articles

• Output redirection and pipelines — A shell instruction that connects a command's stream to a file or another descriptor: > overwrites a file, >> appends, < reads from a file, and 2>&1 sends stderr wherever stdout goes.
• journalctl — reading the systemd journal — Command for reading the systemd journal with service, time, and other filters.
• systemd — System and service manager that manages units and their dependencies.
• less — page through a long file with search — The less pager shows a long file or command output screen by screen — scroll, search by word, follow the end.