Python exercises – challenges – interview training

  There’re lot of python resources, but I like very much the next: https://github.com/zhiwehu/Python-programming-exercises/blob/master/100%2B%20Python%20challenging%20programming%20exercises.txt#L576 http://www.pythonchallenge.com/ http://codingbat.com/python https://www.codewars.com  

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Some tips for finding performance issues in Linux

Sometimes we have some trouble with processes that demands lot of IO. There´s a great tool for that, iotop. I executed fio, to generate some read stress: mkdir -p /tmp/data ; fio –runtime=300 –time_based –name=random-read…

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Where has all my disk space gone? (linux)

Sometimes I receive some nagios alerts, displaying a high usage of a filesystem. The first thing I do, a df -h and after that I du -csh /directory (that I suspect could be guilty). My…

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Wireshark: How to make sure, you are in the right packet!!

  Some weeks ago, we had a strange issue: We have an hl7 messaging service, and one of the clients that send us some messages, was telling there´s some delay with our queues. We had…

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