Ubuntu

Problems and viruses? Ubuntu/Kubuntu 9.10

Asked by ubuntin

Hi!

On the 29th of October, I upgraded from Ubuntu 9.04 to Ubuntu 9.10, but I encountered performance problems since the beginning:

1.My Internet speed is at 206 kb/s, it should have downloaded all the necessary packages (800 MB aprox.) in one hour, but it took like 2 hrs., I think it was the Ubuntu severs load.

2.After upgrade, my system (Laptop Presario R3000, AMD 64, 750 MB Ram, Nvidia 64 MB, dual boot Windows XP) was slow on start-up, and in general, Firefox loading very slow etc.

3.The worst, whenever I restarted or shutdown the PC, my screen looked like Picaso's painting a puzzle of colors appeared suddenly each time before shutdown.

My solution was to change from Ubuntu to Kubuntu.

Kubuntu is working fine, but when scanned the installation with KlamAv, these scan results appeared:

1./usr/bin/fastjar Encrypted.Zip Loose

2./usr/lib/erlang/lib/erts-5.7.2/ebin/prim_zip.beam Encrypted.Zip Loose

Are these (fastjar) and (prim_zip.beam) encrypted.zip files a virus or a threat?

Looks like KlamAv reports encrypted.zip files like a virus.

Are these scan results, a False Positive?

Any help, will be very much appreciated.

Ubuntin.

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Cameron W
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Revision history for this message
Daniel Stone (danielstone) said : 		#1

check the md5 sums of the files against the kubuntu package

Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#2

Possibly reinstall the nvidia drivers

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ubuntin (sotoananda) said : 		#3

Daily Struggle, I am relatively new to Linux. Can you please give me detailed instructions on how to do the md5 sums that you suggested?

actionparsnip, thanks for your comment but in Kubuntu I don't have the problems I experienced with Ubuntu installation, everything is working fine so far, except for the two files detected as posible virus with KlamAv. Are those files legitimate files for Kubuntu installation?

Revision history for this message
Best Cameron W (cwill747) said : 		#4

Hey there. As far as I know, they are not viruses. There is an option in ClamAv that marks encrypted zip files as viruses.

From http://www.clamav.net/doc/latest/man/clamscan.1.in

\fB\-\-block\-encrypted\fR
Mark encrypted archives as viruses (Encrypted.Zip, Encrypted.RAR).
.TP

So you shouldn't have to worry about it. Generally, Linux does not suffer from viruses. (http://www.desktoplinux.com/articles/AT3307459975.html)

And yes, the server load is always crazy on upgrade day. It told me it would take 4 days to download before I used the official torrent.

Also, did you install the 64 bit version of ubuntu? That might be causing you some problems, and make your computer slower, if you didn't.

I get the colors sometimes too.

Revision history for this message
ubuntin (sotoananda) said : 		#5

Hi! Cameron,

Well, I believe that what you said explains the issue about the provable viruses that I mentioned. I did a online scan with Avast! and it didn't flags those files as a Encrypted.Zip viruses, I uninstalled ClamAV/KlamAV and installed BitDefender instead, when I scanned the whole PC the results came clean, no viruses. I think that probably when I switched from Ubuntu X86_64 to Kubuntu x86_64 and installed KlamAV, it configured that option you mentioned without my knowledge, I have had ClamAV working In Ubuntu and never had an issue like that or a virus, I also use rkhunter. By the way, the only issue I have had with Kubuntu was about disabling the tapping or tap-to-click for the ALPS touch-pad, but I fixed it with an script I found googling, so far everything is OK now.

Thank you so much for the information and for the help.

Regards,
Ubuntin

Revision history for this message
Cameron W (cwill747) said : 		#6

Hey, no problem. Glad everything worked out for you : ]