#devops
Linux history:
The history of Linux began in 1991 with the commencement of a personal project by Finnish student Linus Torvalds to create a new free operating system kernel. Since then, the resulting Linux kernel has been marked by constant growth throughout its history. Since the initial release of its source code in 1991
Linux architecture:
1. Kernel:- The kernel is one of the core sections of an operating system. It is responsible for each of the major actions of the Linux OS. This operating system contains distinct types of modules and cooperates with underlying hardware directly.
2.Hardware layer:- Linux operating system contains a hardware layer that consists of several peripheral devices like CPU, HDD, and RAM.
3.Shell:- It is an interface among the kernel and the user. It can afford the services of kernel. It can take commands through the user and runs the functions of the kernel.
4.Hardware drivers: Most of the users of Linux face an issue while using Linux. Various companies of hardware prefer to build drivers for Mac or Windows due to they contain several users than Linux.
Linux Distribution:
Centos
OpenSUSE
Fedora
Solus
Debian
Ubuntu
RHEL
1. Check your present working directory
pwd--> print working directory, Present working directory
2. List all the files or directories including hidden files.
ls --> list all the files and directories
ls -al --> list all the files and directories including hidden In Linux, anything that begins with a . is considered a hidden file.
3.Create a nested directory A/B/C/D/E
mkdir -p A/B/C/D/E
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