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DIG – Make that DNS talk !

dig, Domain Information Groper, is with nslookup and host one of the most commonly used tools to retrieve information from Domain Name Servers. The goal of this article is to give you all the knowledge you need to dig like a pro and enjoy the power of the command line even more. Find the IP addresses behind a domain name, ... Lire la suite »

GIT

In a DevOps environment where people use tickets and kanbans in order to organize their work, a version control system is absolutely necessary. It’s a quick, easy and safe way of isolating and keeping track of changes associated with tickets. Also, it greatly simplifies the collaboration between developers and operations. Created in 2005 by Linus Torvalds and Junio Hamano, GIT ... Lire la suite »

Cheat sheets : learn fast, remember forever

My goal with this blog is to provide as much value as possible to its readers, to reward the time they spend here with knowledge and resources they can use at work and at home. This mindset is what motivated me to spend quite a lot of time this month creating Open Source related cheat sheets using Cheatography, a very ... Lire la suite »

Systemd : our Songs of Innocence

Compatible with SysV and LSB init scripts, Systemd is a system and service manager for Linux. Running as PID 1, it provides parallelization, flexible management of daemons, uses socket and D-Bus activation for starting services, keeps track of processes using cgroups, supports system state snapshotting, maintains mount points and implements a transactional dependency-based service control logic. Despite all these nice ... Lire la suite »

Cloud computing : Does it float ?

Cloud : a marketing concept hiding a complex technical reality, a simple word aimed at non-tech people, similar in its fogginess to the infamous Web 2.0 more than 10 years ago. As always, IT professionals have to see through the marketing fog, and I’m here to help. Lire la suite »

DevOps : A definition

DevOps : Dev for developers, Ops for Operations (i.e. systems administrators), two teams of technicians whose goals have been conflicting since the very beginning. While developers want to release innovative software with exclusive features implying the use of brand new technologies, sysadmins tend to favour the usage of well-known, rock-solid components on their servers. The DevOps movement started to get ... Lire la suite »