How to Hack Your Own Linux System

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53 Responses

  1. 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?

  2. 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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