Nagios is a popular open-source monitoring system. Nagios keeps an inventory of your entire IT infrastructure and ensures your networks, servers, applications, services, and processes are up and running. In case of failure or suboptimal performance, Nagios will send notification alerts via various methods. This article explains how to install Nagios on Ubuntu 20.04. Installing
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Bash: Append to File
This tutorial explains how to append text to a file in Bash. There are different ways to append text to a file. Prerequisite# Your user must have write permission to a file in which you want to append text. Otherwise, you will receive a permission denied error. Append Text using Redirection Operator (>>)# Using Redirection
How to Install Memcached on CentOS 8
Memcached is an open-source, free and high-performance in-memory caching system. Generally, it’s used to speed up web applications by caching large volumes of data in memory from page load requests or API calls. This article explains how to install and configure Memcached on CentOS 8. Install Memcached on CentOS# The standard CentOS 8 repositories includes
How to Install TensorFlow on Debian 10
TensorFlow is an open-source and free software library for machine learning developed by Google. It can be installed system-wide, in a Python virtual environment, as a Docker container, or with Anaconda. Also, large companies like Airbus, Intel, Twitter, PayPal, and Lenovo using TensorFlow. In this tutorial we will show you how to install TensorFlow in
How to Set Up SSH Keys on Ubuntu 20.04
Secure Shell (SSH) is a network protocol for creating a secure connection between a client and a server. With SSH, you can run commands on remote machines, create tunnels, forward ports, and more. SSH supports various authentication mechanisms. The two most common ones are password and public-key based authentication. Authentication using a public key is
Tar Command in Linux (Create and Extract Archives)
The Tar word derived from its name “Tape ARchive”, it was designed to store files on magnetic tape. The tar command is used to make tar archives by encapsulating the files or directories. It can be use to extract tar files, add new files and to list the files included in the archive. In this
How to Install Apache Cassandra on CentOS 8
Apache Cassandra is a free and open-source NoSQL database with no single point of failure. It provides linear scalability and high availability without compromising performance. Apache Cassandra is used by many companies that have large, active data sets, including Reddit, NetFlix, Instagram, and Github. This article explains how to install Apache Cassandra on CentOS 8.
How to Install Memcached on Ubuntu 20.04
Memcached is an open-source, free and high-performance in-memory caching system. Generally, it’s used to speed up web applications by caching large volumes of data in memory from page load requests or API calls. This article explains how to install and configure Memcached on Ubuntu 20.04. Install Memcached on Ubuntu# The standard Ubuntu repositories includes the
How to Change the SFTP Port
SFTP (SSH File Transfer Protocol) is a secure file protocol for transferring files between two hosts over an encrypted connection. It also allows you to perform various file operations on remote files and to resume file transfers. SFTP can be used as a replacement for the legacy FTP protocol. It has all the functionality of
How to Extract (Unzip) Tar Bz2 File
This tutorial explains how to extract (or unzip) tar.bz2 and tbz2 archives using the tar command. The tar command is used to make and extract tar archives. Compression programs such as gzip, bzip2, lzip, lzma, lzop, xz and compress are supporting by it. Extract tar.bz2 File# By default the tar utility comes pre-installed in most