Linux.txt

Basics--
The defining component of Linux is the Linux kernel,an operating system kernel first released by Linus Torvalds.

Windows kernel name  ---- WindowsNT

					Linux
  				       -------
					  |
					_____
				       |    |
				    .rpm    .deb

.rpm - redhat package manager
.deb - extension for debian software package

examples of rpm				examples of deb
Redhat					Debian
Fedora					Ubuntu
Centos					Kali linux

Linux of minimun size 5MB,13.2 MB of Operating system
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command line 			vs gui
can be used in program		   specific location pointing
fast process for large number	   multitasking
More Resources capability	   Easy to use


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how to find difference between file and directory

all directory have forward slash after the name
ls -F

a/     myfile.txt

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alias vs unalias

alias is command to provide nickname to the command

alias ..='cd ..'
when you type .. then work as cd ..
remember it only work in same terminal

unalias ..
will undo alias

now command not found as ..

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nautilus  directory_name to open it graphically 

nautilus  /home/user/a/b/c

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editor in linux

gedit,emacs,vi,vim,nano,pico,gvim,leafpad
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how to use vim?

vim [file name]

i	to insert mode
esc 	to exit insert mod
:w	to save changes			:w 	xyz123.txt
:q	to quit
:wq 	to save and quit
:3	start cursor on 3rd line
:q!	forcefull close without save
/redhat   to search redhat in file

to lock file
vim	-x    xyz.txt  then it ask for password
:set key=	remove password,esc then write it in last
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