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Thread: Can someone explain linux viruses to me!

  1. #11
    ab@novell.com NNTP User

    Default Re: Can someone explain linux viruses to me!

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    I think the onosecond also has relativistic properties....

    Ctrl+Alt+Backspace vs. Ctrl+Alt+Left/Right Arrow
    onosecond is small, but not tiny

    # rm -rf / #forgot/missed the '.' I always put in there
    'onosecond' has a very small value indeed, inversely proportional to the
    time it takes for Ctrl+C to take effect.

    Good luck.





    ken yap wrote:
    > Yes, the bit about not working as root unnecessarily is more for one's
    > own protection than anything else. Who among us has not encountered or
    > had a close shave with the dreaded -onosecond-, which is the shortest
    > interval of time known to man, that between hitting return on a
    > unintended command and realising the mistake?
    >
    >

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  2. #12

    Default Re: Can someone explain linux viruses to me!

    Thanks for all the advise! Most helpful.

    Was hoping to give my aunt a laptop with Linux on it but seeing that you can indeed mess up your system if you run stuff you shouldnt then I'll leave it for now and just run it on my own machine! The number of times they've broken they're XP one by running stupid programs just isnt worth the headache when I dont know how to fix it or even know they have, say, a keylogger installed as you cant scan for one!

    I'll continue learning linux for now and see how it goes and be careful about what I run. Only worry I have is that I may install an application, it seems to work but it may be infected by something and I'll never know

    Will check out the AV systems mentioned as if they can scan for problems now and again taht would be helpful to find out if I've managed to pick up an infection

  3. #13
    ab@novell.com NNTP User

    Default Re: Can someone explain linux viruses to me!

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    Well, by all means give your aunt a Linux box. The joy of Linux is that
    she's going to have a hard time destroying it. She's not going to be
    able to find a virus that easily destroys her system, much less make it
    executable and run it on accident. The applications she does want
    installed she'll learn how to do but it's not going to be as easy for
    her to be infected. If something runs as her regular user you can
    remote in (SSH or something over SSH or whatever) and delete her user,
    recreate it, or restore it from backup, and she'll never even know... no
    reboots required. Trust me.... all the people I know who require hours
    and hours of my time on windows require minutes, at most, on Linux.
    They just stop breaking things. I don't wipe their boxes every six
    months because they're slow or they obviously have viruses. They don't
    run AV software because it's worth my time to let them have a fast box
    and, someday, wipe it if things go wrong. In the meantime I tell them
    to backup their data once in a while (hard drive, CD, DVD, whatever) and
    enjoy their computer. People don't need windows to work.... there are
    much easier ways once they realize the button in the corner doesn't need
    to say 'Start' to be usable.

    Good luck.





    viperuk wrote:
    > Thanks for all the advise! Most helpful.
    >
    > Was hoping to give my aunt a laptop with Linux on it but seeing that
    > you can indeed mess up your system if you run stuff you shouldnt then
    > I'll leave it for now and just run it on my own machine! The number of
    > times they've broken they're XP one by running stupid programs just isnt
    > worth the headache when I dont know how to fix it or even know they
    > have, say, a keylogger installed as you cant scan for one!
    >
    > I'll continue learning linux for now and see how it goes and be careful
    > about what I run. Only worry I have is that I may install an
    > application, it seems to work but it may be infected by something and
    > I'll never know
    >
    > Will check out the AV systems mentioned as if they can scan for
    > problems now and again taht would be helpful to find out if I've managed
    > to pick up an infection
    >
    >

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  4. #14
    Join Date
    Jun 2008
    Location
    Berlin
    Posts
    2,061

    Default Re: Can someone explain linux viruses to me!

    viperuk, you got a totally wrong impression!

    You see, before your aunt will be able to execute some bad script, she has to a) find it, b) make it executable (and know that it has to be make executable), c) run it.

    Futhermore: you see, I have never seen a Linux-compatible file like "HarryPotter123Complete.sh" or "WildHousewifesOnLSD!!!11!!.bin" (not that I think your aunt would want to execute such stuff, kay?). There is no such thing as a Linux-malware-scene, only servers suffer from attacks, for example rootkits and the like → a completely different thing. Attacks could happen by exploiting bad code, and those holes are usually fixed quick via updates. Your aunt herself could mess up her /home (not the entire system) by removing configuration-files or whatever, but that she could do on any system - this includes the idea of you keeping the root-password so she can't do any administrative stuff (like installing software) - I did that on some machines to let the n00b get used to the system without the ability to mess up everything.

    Anti-malware-software won't be of much help, for programs like AntiVir scan for Windows-viruses, not Linux-viruses (which actually simply do not exist, some have been programmed for testing reasons, but they never spread).

    Script kiddies are interested in creating as much chaos as possible, that's why they don't care for Linux → too much work (due to rights management etc.), too little potential success.

    A Linux can be hardened, though, by taking care of potential risks in the network itself - rkhunter or fail2ban are two examples. I have them both running, which is totally ridiculous, since those are normally used on servers. fail2ban for example simply bans a certain IP when more than a certain amount of login-attempts (usually five) have occured → byebye wordbook-attacks; this can be configured for ssh-connections, the usual P2P-ports and other services. Still, I wouldn't consider a Linux without fail2ban insecure...

    I don't want to soothe your worries, but those are facts. To be aware is good, but paranoia is never a good mentor.

  5. #15

    Default Re: Can someone explain linux viruses to me!

    I was reading through the post and wondering what are the typical places that you would download any needed programs. I am new and just trying to ensure that I will get anything from a legit place. Thanks!

  6. #16
    2quick NNTP User

    Default Re: Can someone explain linux viruses to me!


    I was reading through the post and wondering what are the typical places
    that you would download any needed programs. I am new and just trying
    to ensure that I will get anything from a legit place. Thanks!


    --
    2quick
    ------------------------------------------------------------------------
    2quick's Profile: http://forums.opensuse.org/member.php?userid=17255
    View this thread: http://forums.opensuse.org/showthread.php?t=397509


  7. #17

    Default Re: Can someone explain linux viruses to me!

    I would like to add my 2 cents about viruses. Basically, in my experience a virus infection is a direct result of the actions of the user. I've had to fix plenty of windows computers with said problems, and in almost all cases the viruses in question were deliberately installed by the user(s).
    I actually had one person who was having some trouble with an application and needed my help. His Windows computer had run with only the basic built-in firewall, and no anti-virus or anti-spam for over three months, and yet his computer was not compromised. Why? Because he is smart on the internet. He doesn't install things he doesn't need or doesn't know what they do, and doesn't visit suspicious web pages.
    Heck, one of the most tech savvy people I know is not considered so because she can compile in her head, it's because she's aware of her ignorance. Being mindful about your actions is probably the important factor in preventing a virus infection.

  8. #18
    ab@novell.com NNTP User

    Default Re: Can someone explain linux viruses to me!

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    Once you decide which AV solution you like probably just go to their
    website. For example Google found this one for me quickly:
    http://www.clamav.net/ Note that I have never used AV software in Linux
    so I don't really think it's needed largely except for cases like the
    one mentioned in this older article: http://www.linux.com/articles/22899

    Good luck.




    2quick wrote:
    > I was reading through the post and wondering what are the typical places
    > that you would download any needed programs. I am new and just trying
    > to ensure that I will get anything from a legit place. Thanks!
    >
    >

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  9. #19
    ab@novell.com NNTP User

    Default Re: Can someone explain linux viruses to me!

    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1

    Once you decide which AV solution you like probably just go to their
    website. For example Google found this one for me quickly:
    http://www.clamav.net/ Note that I have never used AV software in Linux
    so I don't really think it's needed largely except for cases like the
    one mentioned in this older article: http://www.linux.com/articles/22899

    Good luck.




    2quick wrote:
    > I was reading through the post and wondering what are the typical places
    > that you would download any needed programs. I am new and just trying
    > to ensure that I will get anything from a legit place. Thanks!
    >
    >

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  10. #20
    superppl NNTP User

    Default Re: Can someone explain linux viruses to me!


    I would like to add my 2 cents about viruses. Basically, in my
    experience a virus infection is a direct result of the actions of the
    user. I've had to fix plenty of windows computers with said problems,
    and in almost all cases the viruses in question were deliberately
    installed by the user(s).
    I actually had one person who was having some trouble with an
    application and needed my help. His Windows computer had run with only
    the basic built-in firewall, and no anti-virus or anti-spam for over
    three months, and yet his computer was not compromised. Why? Because he
    is smart on the internet. He doesn't install things he doesn't need or
    doesn't know what they do, and doesn't visit suspicious web pages.
    Heck, one of the most tech savvy people I know is not considered so
    because she can compile in her head, it's because she's aware of her
    ignorance. Being mindful about your actions is probably the important
    factor in preventing a virus infection.


    --
    superppl
    ------------------------------------------------------------------------
    superppl's Profile: http://forums.opensuse.org/member.php?userid=130
    View this thread: http://forums.opensuse.org/showthread.php?t=397509


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