Linux - Training Rajesh Charles

Linux– Introduction Linux is just a Kernel. Linux can be divided into two major components 1.Kernel (interacts with machine hardware) 2.Shell (interacts with the user) The kernel is the essential center of a computer operating system, the core that provides basic services for all other parts of the operating system. A synonym is nucleus. A kernel can be contrasted with a shell, the outermost part of an operating system that interacts with user commands.

Linux– Architecture

Linux– File Structure Basically organizes the way data is stored inside the storage device, such as Disk

Linux– Interface There are two types of Interface in Operating System 1.Graphical User Interface () 2.Command Line Interface () Graphical User Interface Command Line Interface

Linux– Command Line Interface Lets Now take a look into the various Commands in Linux. SnoCommandsDescription 1 lslists your present working directory 2 ls -llist with data modified 3 ls -alist all the file with the hidden files 4cdchange directory 5cat 'filename'to read a file 6Shft +pg upto go next page 7pwdto find the present working directory 8mv to copy a file - we are literally moveing the file in the same directory put the ' if the file has spaces To move it to a specific folder mv filename Test/filename 9mkdirto make a new directory

Linux– Command Line Interface SnoCommandsDescription 10tar -cvzf rajesh.tar.gz Rajeshto create a Archive file 11tar -xvzf rajesh.tar.gz Rajeshto extrace the tar 12rm Filenameto remove a file 13ls -l >list.txtoutput a commad 14 wget hpto download a file fromt the internet 15man unziphelp file 16 grep "literal_string" filename Search for the given string in a single file 17 grep "string" FILE_PATTERN Checking for the given string in multiple files 18 grep -A 3 -i "example" demo_text -A is the option which prints the specified N lines after the match as shown below 19 grep -B 2 "single WORD" demo_text -B is the option which prints the specified N lines before the match. 20grep -C 2 "Example" demo_text-C option shows N lines in both the side(before & after) of match.