Delegating commands with sudo

Articles

• bash — the command shell — A command interpreter for interactive input, builtins, and shell scripts.
• vim — editing files in the terminal — The bare minimum for editing configs; Esc always returns to Normal mode, where letters are commands, not text.
• Paths — basename, dirname, realpath — Splitting a path into a name and a directory, getting an absolute path; a script's own directory.
• File permissions — The Unix permission model — read/write/execute, owner/group/other, special bits.
• Processes — Viewing processes, signals and priorities; finding the processes that hog CPU or memory.
• sudo — running commands as another user — Grants temporary root rights via sudoers; edit the file only through visudo, or a mistake locks everyone out of sudo.
• visudo — edit sudoers safely — The visudo command edits /etc/sudoers and files in /etc/sudoers.d and refuses to save a rule with a grammar error.