Secure Shell or SSH is a cryptographic (encrypted) network protocol operating at layer 7 of the OSI Model to allow remote login and other network services to operate securely over an unsecured network.OpenSSH is a premier connectivity tool for remote login with the SSH protocol. It encrypts all traffic to ... Read More

lsblk command is used to display a list of information about all available block devices. However, it does not give a list of information about RAM disks. Examples of block devices are hard disk, flash drives, CD-ROM. This article explains about how to find a list of block devices in ... Read More

nslookup is a network administration command-line tool available for many computer operating systems for querying Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record. This article explains about nslookup command in detail. Nslookup can be run in two modes, Interactive ... Read More

OpenSSL is a CLI (Command Line Tool) which can be used to secure the server to generate public key infrastructure (PKI) and HTTPS. This article helps you as a quick reference to understand OpenSSL commands which are very useful in common, and for everyday scenarios especially for system administrators.Certificate Signing ... Read More

In this article, we will learn about the ‘date’ command in Linux and how to practically use the ‘date’ command in day-to-day usage with some practical examples. The ‘date’ command is used to print or to change the system date and time.General Syntax[root@localhost ~]# date [OPTION]... [+FORMAT] [root@localhost ~]# date ... Read More

Did you anytime notice about automatically answering questions posted on Twitter and you desire to make one for yourself? you can do it. We find, Twitter bots not only answering the questions, but it also shares its source. You can copy as well make your own little assistant.Twitter Bots DesignThe ... Read More

Guake is a drop-down terminal for GNOME and any other desktop. It aims to provide a quick-access terminal, that show/hide on screen with a simple key pressing. Its style of window is based on an fps games, and one of its goals is being easy to reach. Guake is written ... Read More

In this article, we will learn how to setup TLS/SSL certificates using the “Let’s Encrypt” on Ubuntu server with Apache as a web server, we shall also cover how to automate the certificate renewal using corn jobs.PrerequisitesTo complete this demo we needed to have the below requirementsAn Ubuntu server with ... Read More

In this article, we will learn how to configure FTP server on CentOs 7 using ‘vsftpd’. ‘vsftpd’ (Very Secure File Transport Protocol Daemon) is a secure and very fast FTP server on Linux systems.Installing ‘vsftpd’Below is the command to install the ‘vsftpd’, we needed a root user to run the ... Read More

In this article, we will learn some configuration steps that should be taken care for security purpose and usability, just after a new server is installed. This will help us in building a solid foundation.Avoiding the ‘root’ user LoginThe root is the administrator or the super user in the Linux ... Read More