This sequence of characters (#!) is called shebang and is used to tell the operating system which interpreter to use to parse the rest of the file.
How to Check if a String Contains a Substring in Bash
One of the most common operations when working with strings in Bash is to determine whether or not a string contains another string. In this article, we will show you several ways to check if a string contains a substring.
How to Check (Scan) for Open Ports in Linux
This article describes several approaches to find out what ports are opened to the outside on your system.
How to Check the Kernel Version in Linux
The kernel is the core component of an operating system. In this tutorial, we’ll show you several different ways to find out what version of Linux kernel is running on your system.