Running commands inside a docker container is easier than you think. A docker container is an isolated environment that usually contains a single application with all required dependencies. Many times we need to run some commands inside a docker container. There are several ways in which we can execute a command inside a container and…
View and manage network connections established by a Docker container. Often while working with a Docker container, we need to look at the network connections being used by the container for initial debugging or troubleshooting purposes. You may want to see which IP is listening on a port or how many connections are currently active…
As a Sysadmin, one of the frequent activities is to reboot or power off servers. This could be due to regular maintenance activity like OS patching or due to some hardware failure that requires a system to be powered down for maintenance. A Linux system offers several different ways to reboot or shut down the…
Kubernetes, also known as K8S, is a popular container orchestration tool for managing and scaling containerized infrastructure. kubectl is the common CLI tool that we use to query and manage a Kubernetes cluster. kubectl uses the API interface of Kubernetes to view, control, and manage the cluster. It is supported across different platforms and can…
grep, originally developed for Unix-based systems, is one of the most widely used command-line utility in Linux boxes. Its name comes from another similar command in ed tool, i.e., g/re/p which stands for globally search for a regular expression and print matching lines. grep basically searches for a given pattern or regular expression from standard…
It often happens that we find a Linux system has rebooted in an unplanned way or due to unknown apparent reasons. Finding and resolving the root cause can help in preventing the recurrence of such issues and avoid unplanned downtime. There are several ways we can find out what triggered a reboot. In this article,…
pip (or its recursive acronym “Pip Installs Packages”) is the package installer for Python. Python has an extensive index of available modules and packages that you can use in your projects. Often, downloading them or keeping them updated is a challenge, especially if your project is huge or needs to maintain multiple such projects. That’s…
Let’s learn how to install and configure MariaDB, an open-source popular MySQL Relational Database Management System (RDBMS). It is community developed and has the option of commercial support. MariaDB has been intended to remain highly compatible with MySQL though there are some deviations. In this article, we’ll be covering the installation and configuration of MariaDB…
One of the basic file system administration tasks involves creating, modifying, and deleting different types of files and directories. Knowing some basic tools and concepts for file deletion comes in handy and can save you time. Linux offers several tools that can help us accomplish file removal tasks. Often we need to remove not just…
lsof is a powerful utility available for Linux and Unix-based systems which literally stands for ‘list (of) open files’. Its main function is to retrieve details about various types of files opened up by different running processes. These files can be regular files, directories, block files, network sockets, named pipes, etc. With lsof, you can…
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