How to Hack Your Own Linux System

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58 Responses

  1. Harshavardhan Reddy says:

    Even if the boot order is HDD first and BIOS is locked, I can always unplug the HDD, plug in USB and boot, then plug in the HDD, right? How can one overcome this? I can think of one way.

    In BIOS, do not put second boot preference at all…? But it doesn’t seem great. The HDD can be connected to a portal laptop or something like that and the password be removed.

    Is it possible to encrypt these files in question? If this is possible, feels like the best way to secure the PC.

  2. Priyanshu Kumar says:

    Best starting course in hacking and security world..

  3. Manik Purushottam says:

    Very informative.

  4. Madhu says:

    A very useful article to know how to hack a Linux system.

  5. Gagan says:

    Here I guess It should be a /sbin/sulogin a little typo I guess

  6. Nilesh says:

    Well, even if we put a password for the bios, we can still crack it by resetting the CMOS, isn’t it?
    What can be done for that?

  7. blak says:

    You really saved me today. I am not a Linux admin, but was tasked with changing /nofile value to unlimited. I ran the ulimit -n unlimited, but ulimit -a still showed the value. It didn’t change. So I manually made changes to the /etc/security/limits.conf file by adding

    * 	soft nofile unlimited
    *	hard nofile unlimited
    oracle soft nofile unlimited
    oracle hard nofile unlimited
    

    to the above file. This caused an outage and also blocked any access the mode via root or any other user. Your post really helped me to log on and then correct the changes i made, then a reboot fixed everything and i was able to get back on.

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