Linux · sudo & Privilege Escalation

On a fresh Raspberry Pi OS setup, why can the first user run any sudo command without a password, and how do you tighten it without breaking sudo?

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More in sudo & Privilege Escalation

After one successful sudo, you run several more sudo commands in a row and only the first asked for a password. What controls that window?

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Someone runs su root, becomes root, but finds admin commands in /usr/sbin fail with command not found. What did they forget?

On a server with several admins, why is sudo preferred over sharing the root password, and whose password does each admin type?

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For a long series of admin commands, what does sudo -s give you over prefixing sudo to each one, and how do you leave it?

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