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That's the first edition (2019), not the second (2025). But both are in annas archive, anyway
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"Someone else has pirated this, so it's OK for me to do it as well" isn't a good argument.

If you see litter on the ground already, that doesn't make it OK to litter more.

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It's also freely available from https://kea.nu/files/textbooks/humblesec/linuxbasicsforhacke... and plenty other places with a quick search.
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first edition is also available on Internet Archive in multiple formats
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Not to mention

  Adobe fixes PDF zero-day security bug that hackers have exploited for months

  https://techcrunch.com/2026/04/14/adobe-fixes-pdf-zero-day-security-bug-that-hackers-have-exploited-for-months/
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Why is that relevant? Are you saying that this PDF is infected?
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On top of that, who uses Adobe software to read most PDFs?
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