LUL.md

##KERNEL COMPILATION

• Download any kernel version from https://www.kernel.org.

• tar xJvf kernel_verson_name

• cd linux-version-name

• sudo apt-get install libncurss5-dev libncursesw5-dev

• make menuconfig

• Now modify your modules function like disabling your keyboard etc SAVE and EXIT

• make -j 8 ( andha time)

• make modules

• sudo make modules_install

• sudo make install

• REEBOT

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##KERNEL MODULE

• Make a file hello.c with following code -

.#include <linux/module.h> .#include <linux/kernel.h>

int init_module(void) { printk(KERN_INFO "Hello world 1.\n"); return 0; }

void cleanup_module(void) { printk(KERN_INFO "Goodbye world 1.\n"); }

• Create a file named Makefile in same dir as hello.c with the following content -

obj-m += hello.o

all: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

• make

• sudo insmode hello.ko

• dmesg

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SMTP

.# Download these! sudo apt-get install postfix mailutils libsasl2-2 ca-certificates libsasl2-modules

.# Open sudo vim /etc/postfix/main.cf

.# Add these lines relayhost = [smtp.gmail.com]:587 smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = noanonymous smtp_tls_CAfile = /etc/postfix/cacert.pem smtp_use_tls = yes

.# Open sudo vim /etc/postfix/sasl_passwd

.# Add this line .# This email ID will become the new sender! [smtp.gmail.com]:587 YOURUSERNAME@gmail.com:YOURPASSWORD

.# Some shit! sudo chmod 400 /etc/postfix/sasl_passwd sudo postmap /etc/postfix/sasl_passwd

.# Some more shit! cat /etc/ssl/certs/Thawte_Premium_Server_CA.pem | sudo tee -a /etc/postfix/cacert.pem

.# These are troubled times, harry! sudo /etc/init.d/postfix reload

.# Try sending a mail echo "Mail Body" | mail -s "Mail Subject" reciever@gmail.com

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##FTP

• sudo apt-get install vsftdp

• ftp localhost

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##FTP

• cd /etc

• gedit hosts

• Insert 127.0.0.1 yourname

• Connect to jamaia-wifi

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##BOTLOADER

• Write bootloader code in assembly

• nasm -f bin boot.asm -o boot.img

• Make a bootable PD.