This category contains all the Linux, Solaris and ELK based topics.
In this article, I will take you through the steps to create a self signed certificate using openssl commands on Linux(RedHat CentOS 7/8). It is very important to secure your data before putting it on Public Network so that anyone cannot access it. Installing a SSL Certificate is the way through which you can secure ... Read more
In this article, I will take you through 25+ Popular Examples of Openssl Commands in Linux. openssl is an opensource command line tool in linux primarliy used to generate ssl certificate with the help of private key and certificate signing request(CSR) file. This tool will use OpenSSL Library to implement its tasks.In most of the ... Read more
In this article, we will look into how to enable or disable SELinux Temporarily or Permanently on RedHat/CentOS 7/8. SELinux is a security feature that you will find enabled in many Organizations to protect its resources from Unauthorized access. It is mostly used along with firewall to enhance the OS Security features. Hence it is ... Read more
In this article, we will look into 10 Popular Examples of sudo command in Linux(RedHat/CentOS 7/8). sudo command in Linux is a program used for non-privileged users to provide privileged access of another user, mostly superuser access. In a real world scenario, when you do not want to provide root credentials to another user to ... Read more
In this tutorial, I will take you through 10 Popular Kafka Console Producer and Consumer Examples. Kafka is currently in high demand due to its various use cases. It is widely used as a messaging system, as a storage system and for stream processing. Kafka usually consists of four API Producer API, Consumer API, Streams ... Read more
In this tutorial, I will explain about Apache Kafka Architecture in 3 Popular Steps. Kafka was released as an open source project on GitHub in late 2010. As it started to gain attention in the open source community, it was proposed and accepted as an Apache Software Foundation incubator project in July of 2011. Apache ... Read more
In this article, I will take you through 9 useful w command in Linux with Examples. w is a very basic command line tool used in Linux to find out the users current logged in to the system and the operations or tasks he is currently performing. You can find this tool automatically installed in ... Read more
In this article, I will take you through 12 Most Popular rm command in Linux with examples. Sometimes you might get asked what is the Linux command for removing a directory or what command do you use to delete a file. Answers of all these questions is rm linux command. You might be aware of ... Read more
In this article, I will take you through 26 Useful Firewall CMD Examples on RedHat/CentOS 7. firewalld provides a dynamically managed firewall with support for network/firewall “zones” to assign a level of trust to a network and its associated connections, interfaces or sources. It has support for IPv4, IPv6, Ethernet bridges and also for IPSet ... Read more
In this article, I will take you through 17 Useful Apache Kafka Examples on Linux(RedHat/CentOS 7/8). For many decades Organizations are using databases to store objects and entities. In a more general term objects and entities state but there were also a separate class of people who started thinking about Object events rather than Object ... Read more