brain@127.0.0.1:~$ ls archives/

Unix

14 April 2020Christophe CasalegnoNo comments

Understanding, improving and protecting Bash shell command history on Linux

In this video you will learn how Bash command history works on Linux, how to improve it and how to protect it. Watch the video on YouTube ↗ Christophe Casalegno You can follow me on: Twitter | Facebook | Linkedin | Telegram | Youtube

6 April 2020Christophe CasalegnoNo comments

Unix / Linux philosophy: why mustn’t we change everything?

In this rant of a video, which goes rather against the grain, I share what I see as the pillars of Unix systems, particularly Linux, and what makes them exceptional and different from the rest. I am totally open to innovation, but let’s not forget the principles that have worked for …

23 July 2017Christophe CasalegnoNo comments

Hackers and crackers: the differences

Hackers, crackers, cybercriminals… Unfortunately, the media and the general public have seized on these words for more than two decades. Words, like speech, a keyboard or a knife, are powerful tools that can be used for malicious purposes just as much as to “do good”. Nowadays, as …

14 July 2015Christophe Casalegno1 comment

How to automatically take action if the load average is too high

When you manage servers , it can be useful to take a number of actions automatically (restart a service, add a firewall rule, kill a process, send an alert, etc.) if the load average is too high. The problem with many shell scripts for this is that, if the load average drops slowly after the …

20 January 2012Christophe CasalegnoNo comments

Bind: how to modify the serial numbers of all your DNS zones with sed

You can simply use the sed command to do this: Go to your DNS zone directory and run: Example: That’s done, you can just restart Bind :) – Christophe Casalegno http://twitter.com/Brain0verride http://www.facebook.com/brain.override

Christophe Casalegno Brain 0verride

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