Quiz · 5 questions

⚙️ Environment and Configuration

Variables, dotfiles, aliases, PATH, Homebrew, SSH

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01Why does setting export OPENAI_API_KEY=... in ~/.zshrc not work for cron?

Hint

Cron's shell is non-login + non-interactive; only one of the four zsh files runs.

02What's the right way to add Apple Silicon Homebrew to PATH?

Hint

One canonical eval line sets PATH, MANPATH, INFOPATH atomically.

03When should you use a function instead of an alias?

Hint

Aliases are pure text substitution; functions are tiny programs.

04What does direnv do for project-local environments?

Hint

It scopes env vars to a directory, with an explicit one-time approval.

05Why must ~/.ssh/id_ed25519 be 600?

Hint

openssh refuses to use a private key file readable by anyone besides you.

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