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Posts in 2021

  • How To Install PostgreSQL 9.6 on Ubuntu 20.04

    Thursday, July 01, 2021 in Posts

    Introduction In this tutorial, we learn how to install PostgreSQL 9.6 on Ubuntu 20.04 (Focal Fossa). PostgreSQL, or usually called Postgres, is an open-source object-relational database management system (ORDBMS) with an emphasis on extensibility and …

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  • How to Generate Random Data in PostgreSQL

    Thursday, July 01, 2021 in Posts

    Overview In this tutorial we learn how to generate random data in PostgreSQL. This method is sometimes needed to test the functionality of a PostgreSQL installation whether locally or remotely. Generate Random Data using md5 function in PostgreSQL To …

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  • How To Get Public IP From Command Line

    Sunday, June 20, 2021 in Posts

    In this tutorial we’ll learn how to get Public IP address from Terminal or Command Line. This will be useful to find public IP address of a cloud instance like EC2 instance, Lightsail instance, or DigitalOcean Droplets. We can also use this …

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  • Speedtest CLI on Ubuntu [How To Install]

    Sunday, May 30, 2021 in Posts

    Overview In this tutorial, we learn how to install and use Speedtest CLI on Ubuntu. Running speedtest CLI can be beneficial in the hosting environment to check whether the provided bandwidth is as advertised. Speedtest CLI can also be used to check …

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  • How To Install Redis CLI on Ubuntu

    Saturday, May 01, 2021 in Posts

    Introduction In this tutorial, we learn how to install Redis CLI on Ubuntu. This tutorial can be used in any version of Ubuntu including but not limited to Ubuntu 20.04/18.04/16.04. Install Redis CLI from Ubuntu Repository We can install redis-cli …

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  • How To Check the PostgreSQL Version

    Sunday, April 25, 2021 in Posts

    Introduction In this tutorial we learn how to check the PostgreSQL version installed on a system. There are multiple methods to check PostgreSQL version and we will learn each of the method. PostgreSQL Versioning Starting from version 10. PostgreSQL …

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  • IUS Repository On CentOS 7 : How To Enable

    Thursday, March 18, 2021 in Posts

    Introduction In this tutorial we’ll learn how to enable IUS repository on CentOS 7. IUS stands for Inline with Upstream Stable. IUS will update RPM packages once new versions released by upstream developers. IUS will also not replace stock RPM …

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  • How-to Get [Query] AWS EC2 Instance Metadata

    Thursday, March 11, 2021 in Posts

    Introduction In this tutorial, we will learn how to get EC2 Instance Metadata from an AWS EC2 instance. We will get the metadata using ec2-metadata and ec2 metadata. This is not a typo. The tool’s name is really similar but one of them using …

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  • javax.net.ssl.trustStore Option Behaviour

    Wednesday, March 10, 2021 in Posts

    Introduction In this tutorial we will test the behaviour of javax.net.ssl.trustStore option. The objective is to check whether -Djavax.net.ssl.trustStore option append or replace the default java keystore being used by java. javax.net.ssl.trustStore …

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  • zramctl: command not found [How To Fix]

    Thursday, March 04, 2021 in Posts

    Problem When you run zramctl command in linux terminal / console, you get the following error message zramctl: command not found Solutions to zramctl: command not found How To Fix zramctl: command not found in Ubuntu / Debian / Kali Linux / Raspbian …

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