DIG stands for Domain Information Groper. As the name suggests it is used to grab information from a DNS server. It is one of the most powerful yet most underrated utility. Sometimes we get overwhelmed by all the information that is shown and...
What to do when you can’t chmod chmod?
When you cannot chmod chmod? What to do? This might help to re-instate permission back. Here are following techniques where you can use chmod to change permission when chmod itself is not executable. Using rsync: The first technique is to use rsync...
How does Linux kernel decide which process to kill when there is no memory left on the system?
Linux kernel has a feature or application called OOM Killer. It kills the process whenever it is out of memory. OOM decides which process to kill based on a score that it calculates which is called oom_score. You can find oom_score for each process...
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