Shebang #! Tutorial In Linux Bash

Shebang #! Tutorial In Linux Bash

In computing and Linux the shebang is a character sequence that consists of # and ! . Simply the shebang is expressed as “#!”. The shebang is also called sha-bang, hashbang, pound-bang, and hash-pling. The shebang is used to specify an interpreter for script files. Linux is popular with its script files and scripting languages … Read more

How To Install Docker On Ubuntu?

How To Install Docker On Ubuntu?

Docker is a container technology very popular in Linux distributions. The docker provides the ability to run single or more commands and applications in an isolated secure environment like a VM but with few resources. As a popular Linux technology, Ubuntu supports docker containers. There are different ways to install Docker on Ubuntu. But two … Read more

How To Set Proxy For wget Command?

How To Set Proxy For wget Command?

The wget command is a popular command used to download files via the command-line interface. Proxy is used as an intermediate host which redirects HTTP and HTTPS requests to the destination server. In some cases, we may require to set a proxy for the wget command. In this tutorial, we examine how to set a … Read more

How To Create and Run Bash Script?

How To Create and Run Bash Script?

Bash is a Unix and Linux shell and command interface language. The bash was released in 1989 with the GNU project. The Bash became popular with Linux and related distributions like Ubuntu, Debian, CentOS, RHEL, etc. Bash provides a very useful command-line interface with complete scripting language features. Linux commands can be executed via the … Read more

How To Save iptables Rules Persistently?

How To Save iptables Rules Persistently?

The iptables rules are used to filter network traffic according to the different restrictions. The iptables store the rules in the system memory and do not save these rules persistently to the disk as a file by default. But there are different methods to save iptables rules persistently to a disk. List iptables Tules Before … Read more

Linux pwd Command Tutorial

Linux pwd Command Tutorial

Linux and Unix operating systems provide the pwd command which prints the full pathname of the current working directory. The pwd name comes from print working directory . As a simple command is provided few options. the pwd command is provided as a shell built-in command for most of the shells like Bourne shell, bash, … Read more

How To Generate Random Number In Bash Linux?

How To Generate Random Number In Bash Linux?

Linux bash provides different ways to generate random numbers. Random numbers can be used for different cases like security, selection, generating random content, etc. Linux bash can be used to generate random numbers by using the operating system devices, commands, etc. Using the $RANDOM Environment Variable The bash shell provides the $RANDOM environment variable which … Read more

Linux telnet Command Tutorial

Linux telnet Command Tutorial

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

How To Check/Find OpenSSL Version?

How To Check/Find OpenSSL Version?

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

rsync Command Tutorial with Examples

rsync Command Tutorial with Examples

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