I'm new to Ubuntu and I have seen people online suggesting to add ppa s and download applications outside the software centre. I know that if I don't trust the publisher it is a security risk. But is it ok if I install the application by logging in as another user and never give root privilege to that application? If I don't give root privilege it can't damage my system, since it is another user, it can't damage the files of my regular account. Am I right? Can such a setup prevent keyloggers also? Running kubuntu 18.04 LTS 64 bit
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