It is a UNIX based open-source operating system, managing the hardware and software of computers. There is a variety of distributions or flavors of Linux including commercials like Ubuntu, Fedora, OpenSUSE as well as community-driven like Arch Linux and Debian. But, one thing they have in common is ‘Linux Kernel’. Linux is quite popular among programmers because it is powerful, versatile, and fast, offering the package manager and allowing the programmers to install software without any interruption. Are you an expert Linux programmer? Now, you can easily grab your dream job. Simply, go through the Linux interview questions and it makes you feel confident.
Introducing Kernel
It is the operating system’s heart. Linux Kernel is considered the low-level system software, providing an interface for the users to interact. The kernel is responsible for managing the system resources like RAM, Processor, Disk, and output devices.Shell in Linux
Basically, the Linux shell is a user interface. You can consider entering your inputs into the Linux shell. It will execute the commands, communicating with the Linux operating system to do so. You get to see some varieties such as BASH or Bourne Again Shell, KSH or Korn Shell, CSH or C Shell, and TCSH.Linux file permissions
Three permission types in Linux are:Read
Write
Execute