Command Line:

	https://en.wikipedia.org/wiki/Shell_(computing)

	https://www.webopedia.com/TERM/S/shell.html

	Windows: https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/windows-commands

Linux command (bash):

	https://swcarpentry.github.io/shell-novice/reference/

	https://www.learnshell.org/

	https://www.shellscript.sh/

	https://guide.bash.academy/

	http://linuxcommand.org/lc3_learning_the_shell.php

Books:

	https://www.amazon.in/Linux-Command-Line-Complete-Introduction/dp/1593273894

	https://www.amazon.in/Learning-bash-Shell-Programming-Nutshell-ebook/dp/B0043GXMSY

	https://www.amazon.in/Linux-Bible-Christopher-Negus/dp/111821854X

	https://www.amazon.in/Classic-Shell-Scripting-Hidden-Commands-ebook/dp/B0043GXMPW

	http://index-of.es/Programming/Bash/O%27Reilly%20bash%20CookBook.pdf

	https://www.amazon.in/Mastering-Linux-Shell-Scripting-command-line-ebook/dp/B07BWLL95K


Linux File System:

	https://opensource.com/life/16/10/introduction-linux-filesystems

	https://www.tutorialspoint.com/unix/unix-file-system.htm

	https://likegeeks.com/linux-file-system/

	https://www.linux.com/training-tutorials/linux-filesystem-explained/

NTFS, FAT, ETXT Fisle Systems:

	https://searchwindowsserver.techtarget.com/definition/NTFS

	https://en.wikipedia.org/wiki/NTFS

	http://www.claytonstechnobabble.com/2011/08/fat-ntfs-and-ext-file-systems-whats.html

	https://fossbytes.com/fat32-vs-ntfs-vs-exfat-difference-three-file-systems/

	https://www.howtogeek.com/235596/whats-the-difference-between-fat32-exfat-and-ntfs/

Linux User Administration:

	https://www.guru99.com/linux-admin.html

	https://www.tutorialspoint.com/unix/unix-user-administration.htm

	https://www.youtube.com/watch?v=18JTUgMq4b0

Linux File Management:

	https://www.tutorialspoint.com/linux_admin/linux_admin_file_folder_management.htm

	https://www.tutorialspoint.com/unix/unix-file-management.htm

	https://www.guru99.com/file-permissions.html

	https://www.tutorialspoint.com/unix/unix-file-permission.htm

	https://www.linux.com/training-tutorials/understanding-linux-file-permissions/