March 2018 – POFTUT

Monthly Archive: March 2018


What Is Nagios?

Nagios is an open source system, network, application monitoring system. Nagios is designed to be run on Linux operating system or distributions like Ubuntu, Debian, CentOS etc. Architecture and Components Nagios is not a single component to run. Nagios is actually a suite which provides following components. Nagios IX Nagios...


What Is OpenSSL Library?

OpenSSL is most popular open source cryptography library which provides a lot of tools, libraries, algorithms about cryptography. It is mostly known with Secure Socket Layers (SSL) and Transport Layer Security (TLS) protocols. Supported Encryption Algorithms Encryption is used to make given data unreadable by the intruders. It is mainly...


“Perl warning Setting locale failed” Error and Solution In Linux

All operating systems uses some locale settings to properly interpret language related data. In Linux this settings are called as locale and used even without GUI or desktop environment. They are generally configured during installation of the operating system but also changed after installation. “Perl warning Setting locale failed” is mostly...


How To Install and Access TightVNC Remote Desktop In Linux?

TightVNC is a very handy remote desktop application which is based VNC protocol. TightVNC is mostly used for Linux systems in order to manage with a remote desktop environment with GUI. In this tutorial, we will look at how to install and configure properly to run desktop environments like KDE,...


How To Install and Use Telnet Client In Linux and Windows

Telnet is easiest remote management protocol used in Computer networks. It remains popular even today because of its simplicity. Telnet is a client server protocol where clients uses telnet tool which to connect remote telnet server. This telnet server may be switch, router, windows operating system, linux server or a...


What Is Linux PAM (Pluggable Authentication)

Authentication is important part of the operations systems like Linux. As Linux operating systems are multi user systems and runs a lot of services and complex scenarios they generally need robust and easy to implement complex scenarios authentication system. Linux Pluggable Authentication a.k.a. Linux PAM is very robust and dynamic...


How To Solve ssh-copy-id “ERROR: failed to open ID file” Error

ssh provides secure access to the remote systems console or command line. All linux boxes uses ssh securely. There are a lot of steps to make things secure and easy while connecting and using ssh. ssh provides passwordless authentication with certificates. We can use ssh-copy-id to send our certificate to the remote system but...

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