While developing applications or using services or mounting disks in Linux systems we may see the term UUID or 128 bit number which might seem interesting. UUID is 128 bir number which is used to identify things like name, record, disk whatever we want. Uniqueness What makes UUID so special...
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...
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...
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...
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,...
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...
Address Resolution Protocol (ARP) is auxiliary protocol used by Internet Protocol (IP). ARP is defined with RFC826 and gained main stream over computer networks. ARP is used to resolve IP address with MAC or hardware address of the network interface. As we know MAC address is used to identify nodes...
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...
ls is base command provided by all Linux distributions. We can use ls command to list files, folders or directories. In this tutorial we will look different use cases about ls. List Files and Directories We will start with a simple example. We will use ls command without an option. This will list...
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...
