Linux, Ubuntu, Debian, Mint, CentOS Tutorials
Telnet is a network protocol and tool used to connect remote systems via a command-line interface. Similar to SSH, telnet can be used to manage remote systems. Telnet use the TCP port 23. Event the telnet is created by Microsoft it is popularly used Linux and network systems. In this tutorial we examine how to … Read more
The OpenSSL is an open-source library that provides cryptographic functions and implementations. OpenSSL is a defacto library for cryptography-related operations and is used by a lot of different applications. OpenSSL is provided as a library and application. OpenSSL provides functions and features like SSL/TLS, SHA1, Encryption, Decryption, AES, etc. Find OpenSSL Version The OpenSSL provides … Read more
The rsync is a utility to transfer and synchronize files and folders between different computers in an efficient and secure way. The rsync command is provided by all Linux distributions, Unix systems. The rsync command provides easy synchronization, compression for network optimization, multithread performance, etc. In this tutorial, we examine how can we use the … Read more
The chown command is used to change user and group ownership on Linux and Unix systems. The owner of the files, directories can be changed in different ways by using the chown command. The chown name is the short form of the change ownership . The ownership of a file or directory can be only … Read more
The grep command is the very popular command used to filter string, text, and data in files and command outputs. From an academic point of view, the grep command searches for PATTERNS in each FILE. PATTERNS can be simple text, number, string, or regex (regular expressions). grep Command Syntax The grep command has the following … Read more
Linux and Unix operating systems provide the chmod command in order to change access permission for the files and folders. The chmod command name comes from change mode . The read, write, execute permissions with the sticky bit feature can be changed by using the chmod command. The chmod command is created in 1971 with … Read more
The tcpdump command or tool is used to analyze network packets on Linux systems. It provides the ability to parse, filter and display network packets and protocols in different ways. The tcpdump is created in 1988 for BSD systems and ported most of the Unix, Linux operating systems and became very popular. The tcpdump is … Read more
Pi-Hole is a network-wide adblocking software that can be installed on Linux distributions like Ubuntu, RaspberryPi. Also, the Pi-Hole can be installed on Docker containers easily. The Pi-Hole is used as a DNS server and checks every DNS request and domain name if it is secure. If the requested domain name is not secure the … Read more
The zip compressions are one of the most popular compression formats and algorithms. Even its name has used the term as compression and generally called zipping or unzipping. The zip files can be extracted by unzipping them. Even there are different tools the unzip command is the most popular and regular way to unzip a … Read more
The wget command or tool is used to download and retrieve data from websites, FTP servers, etc. The wget is very popular in the open-source community as a download manager. The wget command can use different protocols to downloads files and data like HTTP, HTTPS, FTP, etc. The wget tool provides robustness, recursive download, non-interactiveness … Read more