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Linux namespaces and cgroups (control groups) are foundational Linux kernel features used to provide process isolation and resource management. They are core components of containerization technologies like Docker, Kubernetes, Podman and other orches...
Sometimes when you have to check functioning of service or troubleshoot connection of apps in Development or Test environments, you need to SSH into server and run commands with sensitive data. For example you may run the application’s docker contain...
SysVinit, or System V init, is the traditional initialization system that Linux distributions used to adopt to bootstrap the user space and manage system processes after the Linux kernel has been booted. Named after the Unix System V style of initial...
This article was inspired by the original postmortem analysis made by Gitlab team during the database outage on January 31 2017. In fact, it is great that enterprise companies don't seal the incidents inside but rather tend to share their experience ...
The bash printf command is a tool used for creating formatted output. Here are some examples of some of the most useful printf format specifiers: %s - used to print a string. For example: name="John" printf "Hello, %s!\n" $name Output: Hello, John!...
dpkg There are two main package systems on Debian - dpkg and apt (advanced package tool) To install a Debian package use: dpkg -i <package_name>.deb To remove a package use: dpkg -r <package_name>.deb To completely remove everything use: dpkg -P <p...
