Linux keylogger without root or sudo! Is it real?
Is it possible for a malicious website to install a key logger on my Ubuntu desktop?
If so, how can I detect and deactivate the key logger?
It is possible, though unlikely. It would be more likely to have a repository that is hacked to include a keylogger.
For more information, see this answer
There is a claim of a Linux keylogger that doesn't need root.
See this other question Linux keylogger without root or sudo! Is it real?