What????!!!! No-one here MADE you do anything!!

Seriously, I would put those specific questions in new threads. Example: To fix XYZ problem, I ran this ABC command. It <<worked/did not work>> and I have a question about <<why/details/other>>

I for one am not going re-read the whole thread to get what I need to answer specific questions.

Hi,

I don't mind 'debriefing' , just hope I can clear up some of the gaps.

I don't know why the file became hidden when you compressed it. What archiver do you use?

About the mentioning of ureadahead in the log, that seems to be bug related to me. Have a look at this link:
https://bugs.launchpad.net/ubuntu/+s...ad/+bug/484677

Take it from there to see if you can find something, maybe an upgrade of the ureadahead package?

I don't quite understand what you mean with unix-chkpwd lines in your log. To what are you referring? What exactly is it you'd like to see in your log?

Kind regards,

Eric

LOL, you're right, we didn't MAKE him do it, I'm assuming that's a figure of speech the OP uses.

Kind regards,

Eric

Yeah I'm sorry. I'm not English native and I might use some words that sound weird to you.
I didn't mean anything offensive. On the contrary, I'm really thankful that Eric gave me a step by step, because I'm new to linux and lost when it comes to admin tasks.

The archiver I used is just the one provided by my system (I guess, although I wasn't the one who installed the system so I can't be sure). I right-clicked and pressed "compress...". I don't know its name.

Here is a line sample that was taken from a /var/log/syslog file (not on my computer, obviously : that's what I want) :
Feb 6 04:20:40 www unix_chkpwd[20528]: password check failed for user (root)

Don't worry, I'm no native English speaker neither (that sounds weird ), so I'm not taking something as an offense that rapidly.

I don't have access to an Ubuntu at this time to check the archiver. About the line in your syslog, I'm sure I've seen it in log files on our Debian servers at work and I didn't install anything strange on them. I'll check on Monday to see what generates them.

Kind regards,

Eric

So I posted the 3 questions in different topics (here, here, and here).
I consider this topic closed. Thanks to all, especially repo and Eric.

I've noticed You're welcome.

Kind regards,

Eric