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I've made a personal Live CD on Ubuntu builder but I didn't add a password to the Live CD.

Is it possible to add a password to a live CD in any way? (before or after creating the CD)

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You will have to edit the casper scripts.

This varies slightly between versions of Ubuntu, see:

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As Ubuntu wiki page says:

You can set a password during a LiveCD session by opening a terminal, and typing in:

sudo passwd ubuntu

Note that this will set the password only for the current session (which is far less useful).

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some source of verification would be useful for this answer I think – Anwar Shah Sep 17 '12 at 15:42
That method only sets a password for the current session and will not persist with a reboot. – bodhi.zazen Sep 17 '12 at 19:22

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