Linux Operating System

         Linux is a Unix-like computer operating system assembled under the model of free and open source software developmentand distribution .The defining component of Linux is the Linux kernel , andoperating system kernel was first released October 5 , 1991 by Linus Torvalds . Itwas originally developed as a free operating system for Intel x86-basedpersonal computers . It has since been ported to more computer hardwareplatforms than any other operating system . It is a leading operating system onservers and other big iron systems such as mainframe computers andsupercomputers . It also runs on embedded systems such as mobile phones ,tablet computers , network routers , televisions and video game consoles ; theAndroid system in wide use on mobile devices is built on the Linux kernel . Asfollows , here is some list of Linux common commands :

admin : create and administer SCCS files .

at : execute commands at a later time .

batch : schedule commands to be executed ina batch queue .

cal : print a calendar .

cat :concatenate and print files .

cd :change the working directory .

chgrp :change the file group ownership .

chmod :change the file modes/attributes/permissions .

chown :change the file ownership .

clear :clear the screen .

cmp :compare two files .

command: execute a simple command .

cp :copy files .

cut :cut out selected fields of each line of a file .

date :display the date and time .

diff :compare two files .

echo :write arguments to standard output .

false :return false value .

file :determine file type .

find :find files .

get :get a version of an SCCS file .

getconf: get configuration values .

grep :search text for a pattern .

id :return user identity .

jobs :display status of jobs in the current session .

kill :terminate or signal processes .

locale: get locale-specific information .

logger: log messages .

lp :send files to a printer .

ls :list directory contents .

man :display system documentation .

mkdir :make directories .

more :display files on a page-by-page basis .

mv :move files .

newgrp: change to a new group .

ps :report process status .

pwd :print working directory or return working directory name .

rm : removedirectory entries .

rmdir :remove directories .

time :time a simple command .

touch :change file access and modification times .

true :return true value .

uname :return system name .

vi :display editor .

what :identify SCCS flies .

who :display who is on the system .

write :write to another user’s terminal .