When you first look at this question and its title you are going to assume that I want this for malicious purposes, however that is not the case, it is because I type a lot of things, and sometimes (rather often actually) I just want to check what I did, say, half an hour ago, or make sure that I didn't just make a big mistake, however there is no real history of what I type so this becomes rather difficult.
Another reason for this might be that my computer is running certain tasks which should not be interrupted until complete, so I can't suspend my machine, but I would like to be able to come back and tell if anybody typed anything (because most often this is a CLI only session so I don't need to worry about the mouse and I can use other software such as screen recording for that), or executed any keyboard shortcuts.

So, long story short, I would like a "keylogger" however I do not want to install one from anywhere as I don't trust that there aren't any backdoors or anything, so what I would like is a script (and I know that this sort of thing is possible) which:

  • Is able to record (probably in a text file) keystrokes and also when the pressing of a key once results in the character coming out more than once

  • Is able to tell apart keyboard shortcuts from normal typing and also show what the result of the keyboard shortcut was

  • Works in the GUI and CLI

  • Works on Ubuntu GNOME 15.10 with GNOME 3.18 (my system)

  • Preferably written in a language such as bash

  • Only keeps a log of the last 5 minutes (though this should be a variable time which can be easily changed in the code)

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    There is one in the repositories. You do not trust our repositories? Then the world is doomed. I would not trust software that "which can be easily changed in the code)" .... that should be in a configfile (insert angry face) – Rinzwind Jan 26 '16 at 15:37
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    Oh and manpages.ubuntu.com/manpages/trusty/man8/logkeys.8.html has a hint: " It relies on the event interface of Linux input subsystem (normally devices /dev/input/eventX)." – Rinzwind Jan 26 '16 at 15:40
  • @Rinzwind: The universe repository is not really checked in-terms of security stuff by the Ubuntu Security Team so I don't really trust it so much, especially with this kind of thing... – user364819 Jan 26 '16 at 15:45
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    But... you could download the source and peak in that without installing it. Oh and I believe logkeys has no backdoors. I've seen the code a year or so ago since I was curious too ;-) – Rinzwind Jan 26 '16 at 15:46
  • Really, your nickname seems to be great for you! You can read the source code and then compile. Also check the readme for assembly backdoor code. 😉 – Helio Apr 5 '16 at 9:59

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