The RHCSA exam is open-book in one crucial sense: you have full access to man pages on the exam system. You cannot browse the internet, but you can look up any command's syntax, flags, and configuration file format right from the terminal. Knowing how to navigate man pages quickly is arguably more valuable than memorizing every flag — because if you forget a detail, man will bail you out. Beyond man pages, commands like --help, which, whereis, type, and uname round out your toolkit for discovering what's available on the system and how it's configured.
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