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How can I trust any Repositories like

sudo add-apt-repository ppa:upubuntu-com/tor

or

sudo add-apt-repository ppa:wagungs/Kali-linux

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marked as duplicate by saiarcot895, dobey, Warren Hill, Seth Aug 5 at 14:31

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GPG keys are a method of public key cryptography, and are safe enough to confirm that you did indeed download the package from where you were supposed to. Whether to trust that source or not cannot be verified by a key check (except probably keys which are universally established (eg Ubuntu package signing keys)). –  prakharsingh95 Aug 5 at 14:37

2 Answers 2

up vote 6 down vote accepted

You can trust them as much as you trust the people who put them up. Anyone can put up a PPA; a repository owned by some random user is obviously less trustworthy than the official LibreOffice PPA, for example.

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Good question. The short answer is: you can't trust them.

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