Share Files Between Guest and Host in Virtual Box

Posted by miatech on May 09, 2016
virtualization / No Comments

Sharing files between the host and guest Operating System in Virtual Box is not that simple. For example, if you’ve ever used VMWare Workstation, it is possible to transfer data between host and guest by just dragging files with the mouse. But it is not the case in Virtual Box, as the Virtual Box behaves in a complete different environment in Virtual Box. Basically, you have to setup a directory in your host machine and then share it with your guest, using virtual box. In this video I explain how to share files in Virtual Box.

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Adding a Circle to an Image in GIMP

Posted by miatech on April 29, 2016
Gimp / No Comments

Sorry folks, I have not had a lot of time lately, so the amount of writing I’m doing is less. But I’m trying to keep posting helpful videos. Lately, I have been doing quite a bit of work in GIMP. Mostly, I have been using it to edit still image that I incorporate on my videos. I believe, GIMP is an incredible image editor. And is free. In this tutorial I go over how place a circle in your image in order to draw the attention of the user.

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Extracting an Image From Background in GIMP

Posted by miatech on April 29, 2016
Gimp / No Comments

In this tutorial I’m going to demonstrate how to extract an image from its background in GIMP. This is an extremely useful technique in image manipulation as it allows you to combine images together. For example, you can extract an object or person from an image and place it on top of the background of a second image. Here’s a video I made on how to extract the foreground image from a picture in GIMP.

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Creating and Running Script File in Linux

Posted by miatech on February 19, 2016
Bash / No Comments

There are several steps involved in creating and running a bash script. First, you have to create the actual file. Second, you edit the file (adding the code). Finally, you save the file and execute. This video tutorial goes over the steps on how to create and execute a bash script in Linux.

And here’s the transcript of the terminal session

jorge@nixbox ~/test $ vi hello.sh
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ cat hello.sh
#!/bin/bash
#author
#date
#purpose:
echo "Hello World!.."
#END
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ ./hello.sh
bash: ./hello.sh: Permission denied
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ ls -l hello.sh 
-rw-r--r-- 1 jorge jorge 66 Feb 19 15:09 hello.sh
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ chmod +x hello.sh 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ ls -l hello.sh 
-rwxr-xr-x 1 jorge jorge 66 Feb 19 15:09 hello.sh
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ clear
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $ ./hello.sh 
Hello World!..
jorge@nixbox ~/test $ 
jorge@nixbox ~/test $

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Adding Google as Default Search Engine in Firefox Linux Mint

Posted by miatech on February 03, 2016
google, linux / No Comments

Being a user of Linux Mint, I find every time I install the OS, one of the things I find myself doing is adding Google to Firefox’s list of search engines. No, Google doesn’t come included in the list of search engines in Firefox. You can read here why Linux Mint doesn’t include Google in their search engine list, but it boils down to revenue and money. In this video I cover how to add Google to the list in Firefox.

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Reseting Lost Admin Password in Canon Pixma

Posted by miatech on February 02, 2016
Printers / No Comments

If you’re supporting many network devices, I’m sure at some point you’ve come across a device for which you didn’t know the password. In this case, I’m talking about a Canon printer. If you lost the admin password, here’s a quick way to reset it.
1- Reset your printer network connection by pressing the “Stop” button until the “Alarm” lights flashes 17 times, then release the “Stop” button.
2- Access the printer Administration interface. You shouldn’t be prompted for a password, since you just reset the settings to factory default.
3- Give the Admin a password by clicking “Security->Reset Administrator Password” next time you will be prompted for a password, so better remember this time!
canon_passwordReset

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Scaling Down an Image Using Imagemagick

Posted by miatech on February 02, 2016
graphics, internet / No Comments

imneeeerdoIn my last post, I used GIMP to scale down an image for the web. But there’s a command tool in Linux, for those of you not afraid of tinkering with the shell, called Imagemagick. This tool makes the process of scaling down the picture pretty easy, as you only have to enter the percentage by which you wish to downsize your image. Furthermore, I also noticed that if I keep the output image with same extension, works a lot better, than if I change it to png. Which is the recommended for the web. Any ways, here’s the command:

convert GEDC1008.JPG -resize 10% outputSmall.jpg

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Preparing an Image for the Web with Gimp

Posted by miatech on January 27, 2016
Gimp, graphics / No Comments

gimp-logoI happen to take quite a few pictures with my camera. And as you can imagine cameras today come with pretty decent resolution. But that seems to be kind of a problems. Especially, when using them on the web. One of the requirements of an image on the web, is that it needs to be small in size. In this brief tutorial, I go over how to scale down an image using Gimp.
1 – Open your image in gimp. Just right click on the image and click open with Gimp.
2 – Once the image is open. Click Image->Scale Image.
gimpWeb1
3 – Next is a matter of playing around with the numbers. I usually reduce the image in both in size and resolution and select Cubic. “gimpWeb2
4 – Finally, click File -> Export As. And make sure you save the file with extension “png”
gimpWeb3

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Installing Kali Linux Tools on Ubuntu Using Katoolin

Posted by miatech on January 15, 2016
Bash, Kali Linux, pentesting, security / No Comments

Katoolin is an amazing python utility that allows you to add repositories and install any tool from Kali Linux distribution. Kali Linux is an amazing penetration testing tool that allows System Admin, Security Professionals or Hackers perform any kind of security related task on networks and computers. One of the advantages of Katoolin is that you don’t have to install the whole array of tools that come with Kali Linux, as you can select only the tools you want, and still keep your distribution. Also, it allows you to have all these tools with out changing to a different distro like Kali, which is only for penetration testing. In this tutorial I go to the process of installing katoolin and downloading a couple of security tools from the Kali Linux repositories.

Download katoolin zip file

wget https://github.com/LionSec/katoolin/archive/master.zip

Unzip it

jorge@buntop:~$ unzip master.zip 
Archive:  master.zip
b625d4191e5aded9b5d01a37e00e5918c1bf86bd
   creating: katoolin-master/
  inflating: katoolin-master/.gitignore  
  inflating: katoolin-master/Changelog.txt  
  inflating: katoolin-master/LICENSE  
  inflating: katoolin-master/README.md  
  inflating: katoolin-master/katoolin.py

change directory into katolin-master directory and give proper permission to katoolin.py
give proper permision to katoolin.py

jorge@buntop:~$ cd katoolin-master/
jorge@buntop:~/katoolin-master$ ls
Changelog.txt  katoolin.py  LICENSE  README.md
orge@buntop:~/katoolin-master$ chmod 755 katoolin.py
jorge@buntop:~/katoolin-master$

Continue reading…

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Fixing Handbrake Unable to Rip DVD After Installation in Ubuntu

Posted by miatech on December 18, 2015
Bash, linux, ubuntu / No Comments

I use handbrake to backup my old movies and store them on my Home Media Server. As it is easier to play them from my TV set. I won’t go into details about my Media Center setup at home, but rather I want to go over how to fix Handbrake inability to rip dvd after install. Yesterday, After I installed Handbrake, I proceeded to backup one of my movies, and the application just will not open the titles in the movie. In other words, it was unable to read the movie, much less burn it. Doing a bit of research online, I discovered that there are a few steps that needed to be completed after Handbrake installation. Like Installing Ubuntu-rescritcted-extras and libdvdread4, which is used to read and prepare the dvd.
Update system and Install Ubuntu Restricted Extras

sudo apt-get update && sudo apt-get upgrade  
sudo apt-get install ubuntu-restricted-extras ubuntu-restricted-addons

Install the Library needed to read all types of DVD and execute the script for it

sudo apt-get install libdvdread4   
sudo /usr/share/doc/libdvdread4/install-css.sh