Linux is an open-source operating system with a kernel developed by Linus Torvalds. The kernel manages system resources and communication between hardware and software. Common Linux commands include alias, wget, find, chmod, scp, ssh, grep, cd, cp, vim, ifconfig, hostname, ps, kill, pwd, passwd, ln, mkdir, and rmdir. File permissions are defined using owner, group, and other designations with read, write and execute attributes. Ports can be configured using commands like -Dgrails.server.port.http in Grails applications.

1. LINUX

2. What is Linux
Linux is, in simplest terms, an operating
system. It is the software on a computer that
enables applications and the computer
operator to access the devices on the
computer to perform desired functions.
Linux's kernel (the central part of the
operating system) was developed by Linus
Torvalds at the University of Helsinki in
Finland.

3. Kernal
Each operating system uses a kernel.
Without a kernel, you can’t have an
operating system that actually works.
The kernel’s job is to talk to the hardware and
software, and to manage the system’s
resources as best as possible.
It talks to the hardware via the drivers that
are included in the kernel

4. Architecture

5. Find Commands
alias l=ls
wget
find . -name tecmint.txt
find /home -name tecmint.txt
find /home -iname tecmint.txt
find / -type d -name Tecmint
find . -type f -name tecmint.php
find . -type f -name "*.php"

6. Permission
The Permission Groups used are:
owner-u
group-g
all user-o or a

7. The Permission Types that are used are:
r - Read=4
w - Write=2
x – Execute=1

chmod

man

8. commands
scp
ssh(securely login onto remote system)
grep
cd
Cd ..

9. commands
cp
vim
bashrc
ifconfig
/etc/host
hostname

10. ps -eaf | grep java
kill -9
pwd (current Directory)
passwd-for change password
ln -s (softlink)
ln(hardlink)
mkdir
rmdir(remove empty directory)

11. How to change the default port of localhost in
grails
-Dgrails.server.port.http=8090

12. Thank You