Techxpert: Linux

Showing posts with label Linux. Show all posts

Saturday, 9 March 2013

Install grub in redhat linux after installing windows

I installed window7 --> than redhat 6 --> than again Window7

Now I am not getting to boot from redhat

Boot from RHEL6 DVD.

Rescue installed system

Choose = Language, Keyboard,

Rescue Method = Local CD\DVD

Setup Networking = Yes / No (any),

Rescue Screen = Continue

First Aid Kit quickstart menu = shell Start shell.

bash-4.1#chroot /mnt/sysimage
bash-4.1#cd /boot/grub
bash-4.1#fdisk -l
bash-4.1#grub-install /dev/sda1

If no error reboot the the system.

window 7 and Redhat 6 dual boot

TECHXPERT INFOTECH Linux , windows

Install grub in ubuntu linux after installing windows

TECHXPERT INFOTECH Linux , windows

If you install window first and than install Ubuntu.

Because of some problem you install window again after Ubuntu installation.

Now you are not getting the option of Ubuntu.

TO get the Ubuntu option you have to install Ubuntu grub again on HARD DISK.

For that Boot from the same version of Ubuntu you installed earlier.

Select the Try Ubuntu

open terminal

########## Find the Linux partition with ##########

sudo fdisk -l

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000cf1c8

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT
/dev/sda2 206848 184322047 92057600 7 HPFS/NTFS/exFAT
/dev/sda3 184324094 391354367 103515137 5 Extended
/dev/sda4 391354368 625137663 116891648 7 HPFS/NTFS/exFAT
/dev/sda5 184324096 360103935 87889920 83 Linux
/dev/sda6 360105984 391354367 15624192 82 Linux swap / Solaris

########## mount the linux partition on /mnt ##########

sudo mount /dev/sda5 /mnt

########## mount (bind) the live CD Dir with installed linux Dir ##########

sudo mount --bind /proc /mnt/proc

sudo mount --bind /dev /mnt/dev

sudo mount --bind /sys /mnt/sys

########## Get the root privilege ##########

chroot /mnt

########## Install the grub ##########

grub-install /dev/sda

metasploit window7 hacking

TECHXPERT INFOTECH Hacking , Linux

metasploit windowXP Hacking (silent)

TECHXPERT INFOTECH Hacking , Linux

metasploit windowXP Hacking (remote Desktop)

TECHXPERT INFOTECH Hacking , Linux

how to sniff password with cain & able

TECHXPERT INFOTECH Hacking , Linux

Forensics:Picture Has Been Photoshopped or Not

TECHXPERT INFOTECH Hacking , Linux

1.Open the website http://fotoforensics.com/

2. Upload the picture you want to verify.

see the result

example:

photoshopped image

you can see image color difference is very much.

Original Image

you can see image color difference is very much.

for more information you can read the tutorial

http://fotoforensics.com/tutorial.php

E-book for linux Command line reference

TECHXPERT INFOTECH Hacking , Linux

Linux command line reference => Click here to Download

qemu configuration on gns3 on ubuntu linux

TECHXPERT INFOTECH Linux , networking

root@techxpert:/opt/GNS3#cd qemu
root@techxpert:/opt/GNS3/qemu#wget http://download.savannah.gnu.org/releases/qemu/qemu-0.11.0.tar.gz

installing and patching the Qemu

root@techxpert:/opt/GNS3/qemu#tar xvzf qemu-0.11.0.tar.gz
root@techxpert:/opt/GNS3/qemucd qemu-0.11.0

root@techxpert:/opt/GNS3/qemu/qemu-0.11.0#wget http://downloads.sourceforge.net/gns-3/qemu-0.11.0-olive.patch?download

rename the file qemu-0.11.0-olive.patch?download ---> qemu-0.11.0-olive.patch

root@techxpert:/opt/GNS3/qemu/qemu-0.11.0#patch -p1 -i qemu-0.11.0-olive.patch
root@techxpert:/opt/GNS3/qemu/qemu-0.11.0#./configure
root@techxpert:/opt/GNS3/qemu/qemu-0.11.0#make

root@techxpert:/opt/GNS3/qemu/qemu-0.11.0#sudo make install

Open Gns3 Go to menu-->edit--preferences-->General setting

path of qemuwrapper = /opt/GNS3/GNS3-0.8.3.1-src/qemuwrapper/qemuwrapper.py
working direcatory = /opt/GNS3/tmp
path of qemu= /usr/local/bin/qemu
path of qemu-img=/usr/local/bin/qemu-img

Now open option qemu Guest

Identifier name = your name
Binary image = location where you have saved
left default all options.

configure virtual box on gns3 on ubuntu

TECHXPERT INFOTECH Linux , networking

gns3 installation on Ubuntu linux

TECHXPERT INFOTECH Linux , networking

Installing dependencies

techxpert@techxpert:~/Desktop$ su
Password:
root@techxpert:/home/techxpert/Desktop# cd /
root@techxpert:/#
root@techxpert:/#apt-get update
root@techxpert:/#apt-get install python
root@techxpert:/#apt-get install qt4-dev-tools
root@techxpert:/#apt-get install pyqt4-dev-tools
root@techxpert:/#apt-get install libncurses5-dev zlib1g-dev libsdl-dev libpcap-dev

Step: 2
root@techxpert:/# cd /opt/
root@techxpert:/opt# mkdir GNS3
root@techxpert:/opt# chmod 777 GNS3
root@techxpert:/opt# cd GNS3/

Step : 3
Creating Folders

root@techxpert:/opt#mkdir Dynamips
root@techxpert:/opt#mkdir IOS
root@techxpert:/opt#mkdir Project
root@techxpert:/opt#mkdir Cache
root@techxpert:/opt#mkdir tmp
root@techxpert:/opt#mkdir qemu

Step : 4
Assign Folder Permissions
root@techxpert:/opt#chmod 777 *

Download GNS3 source
from http://www.gns3.net/download/

Download Dynamips
form http://www.gns3.net/download/

Step : 5

Setting up the GNS3 files and Permission

root@techxpert:/opt/GNS3#tar -xjvf GNS3-0.8.2-src.tar.gz
root@techxpert:/opt/GNS3#rm GNS3-0..8.2–src.tar.gz
root@techxpert:/opt/GNS3#chmod 777 GNS3-0..8.2–src
root@techxpert:/opt/GNS3#cd GNS3-0.8.2-src
root@techxpert:/opt/GNS3#chmod 777 *.*

Step : 6
Settingup the permission for Dynamips
root@techxpert:/opt/GNS3/Dynamips#chmod 777 dynamips-0.2.8-RC2-amd64.bin

apache2 php mysql phpmyadmin installation on Ubuntu

TECHXPERT INFOTECH Linux ,

techxpert@server:~$su -

2 Installing MySQL 5

root@server:~#apt-get install mysql-server mysql-client

3 Installing Apache2

root@server:~# apt-get install apache2

4 Installing PHP5

root@server:~#apt-get install php5 libapache2-mod-php5

root@server:~#/etc/init.d/apache2 restart

5 Testing PHP5 / Getting Details About Your PHP5 Installation

root@server:~#gedit /var/www/phpinfo.php

<?php phpinfo(); ?>

6 Getting MySQL Support In PHP5

root@server:~#apt-get install php5-mysql php5-curl php5-gd php5-intl php-pear php5-imagick php5-imap php5-mcrypt php5-memcache php5-ming php5-ps php5-pspell php5-recode php5-snmp php5-sqlite php5-tidy php5-xmlrpc php5-xsl