GRUB 2 recovery

We often come across a condition in which the boot loader gets corrupt. Here are a few steps that will help you recover your GRUB 2 boot loader.
Boot from a live CD or DVD, which supports GRUB 2 (Ubuntu 9.10 CD or above. A DVD will take more time than a CD, so I suggest you boot from a CD).
Open the terminal and run fdisk -l to check the partition from which you want to recover GRUB 2.
Here I assume that you want to recover it from /dev/sda1.
Then run the following commands:
 
sudo mkdir /media/sda1
sudo mount /dev/sda1 /media/sda1
sudo mount --bind /dev /media/sda1/dev
sudo mount --bind /proc /media/sda1/proc
Now chroot into that partition by running the command given below:

sudo chroot /media/sda1

Then re-install GRUB, as follows:

grub-install /dev/sda

The output should be like what’s shown below:

Installation finished. No error reported.

If you get an error, then try the following command:

grub-install --recheck /dev/sda

After a successful installation, exit from chroot and unmount the file systems that were mounted to recover GRUB. Now reboot.

exit
sudo umount /media/sda1/proc
sudo umount /media/sda1/dev
sudo umount /media/sda1
sudo reboot

You’ve successfully completed recovering your GRUB boot loader.

Information courtesy: EFYTimes News

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How to force install .deb package

In certain contexts debian packages are reluctant to install using gdebi or software center due to dependencies problem. In that case, you can install .deb file using following command,

dpkg --force-all -i PackageName

e.g. dpkg --force-all -i google-chrome-stable_current_i386.deb

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How to fix E: Could not get lock /var/lib/apt/lists/lock problem

You got following message when you try to run apt-get update command in Ubuntu?

E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

 Solution

1. Search for processes

ps -A | grep apt-get

2. See if there is any process running as apt-get then kill that process

sudo kill -9 

If the error persists, apply following commands in a termina,

sudo su

sudo rm /var/lib/apt/lists/lock

apt-get update

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Locate photo interrupter on Samsung CLX-3170, CLX-3175 series

Here are the three places where you can find the photo interrupter 0604-001095 (or 0604-001415) in Samsung CLX-3170 and CLX-3175 printers:


Below the cover middle:

the cover middle

 Under the cover: the photo interrupter is the number 4

In the fuser:

The photo interrupter is the number 21:

In the scan unit:

The photo interrupter is at number 2

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Get your 3D Printed Menurkey!

OK, so the final product is actually made of ceramic, but 3D printing was integral in its prototyping stage.  The original design was created using TinkerCAD, and prototypes printed by Makerbot.  There are even some related designs on Thingiverse, but in this case, I think the original is still the best!

The Menurkey is a menorah shaped like a turkey.  The brainchild behind the Menurkey is 4th grade Asher, "an inventor and aspiring video game designer who also loves to read and play golf."  He and his family put his project on Kickstarter in August, 2013, and it was funded almost 200%!  (You can still buy your own today, but it may arrive after the holiday.)

Why you may ask?  If you haven't already heard:

The reason Hanukkah and Thanksgiving will overlap this year is because the Jewish calendar repeats on a 19 year cycle, and Thanksgiving repeats on a 7 year cycle.  You would therefore expect them to coincide roughly every 19×7 = 133 years.  Which is correct – the last time it would have happened is 1861.  But Thanksgiving was only formally established by President Lincoln in 1863 (which is why it has never happened before).  It may not happen again because the Jewish calendar is very slowly getting out of sync with the solar calendar, at a rate of 4 days per 1000 years.  This means that while presently Hanukkah can be as early as 11/28, over the years the calendar will drift forward, such that the earliest Hanukkah can be is 11/29.  The last time Hanukkah falls on 11/28 is 2146 (which happens to be a Monday).  Therefore, 2013 is the only time Hanukkah will ever overlap with Thanksgiving.  Of course, if the Jewish calendar is never modified in any way, then it will slowly move forward through the Gregorian calendar, until it loops all the way back to where it is now. So, Hanukkah will again fall on Thursday, 11/28…in the year 79811.

You can read more about the Menurkey and the Menurkey Team on their website.  You can also like them on Facebook. :)

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The gear works!

Who would have guessed?  A while back, a student printed this gear off of Thingiverse. When it printed, we all assumed it didn't work.  In theory, it should have worked, but we couldn't get the gears to move.

Fast forward a few weeks, and one of the kids was playing around with the 3D printed stuff and stuck an Allen wrench into the center of the gear and voilà - it worked!  Seems we just needed a little more torque than we were providing by hand.

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Mobile media converter

Mobile Media Converter is a helpful tool for mobile users to cross platform transfer of media files. It can handle various formats like MP3, Windows Media Audio (wma), Ogg Vorbis Audio (ogg), Wave Audio (wav), MPEG video, AVI, Windows Media Video (wmv), Flash Video (flv), QuickTime Video (mov) and commonly used mobile devices/phones formats like AMR and 3GA audio (amr) and 3GP video.

Here is the link to mobile Media Converter

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How to scan without cartridge

This trick is available only for some Canon inkjet printers.


Procedure:

• Power off the printer.
• Hold on the Power button and, without release it,  push 2 times the "Stop/reset" button.
• Release the Power button. 
• The printer displays "0"
• Click on "+" to switch from "0" to "1"
• Push the color button.
• Push the power button two times.
• Open the cover and remove the cartridges.
• Close the cover
• Power on the printer

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How to fix scanning error - cannot scan error code 2,155,0 or 2.155.13

With Canon, the message "Cannot scan error" is followed by an error code 2.155.13, 2.155.0, ...


Solution 1:

• Replace USB cable.

Solution 2:

• If the printer is connected on a USB USB self powered: the hub may not be enough powerful. 
• Replace it with a hub with a power adapter.

Solution 3:

• Uninstall and reinstall the printer drivers.

Solution 4:

• Réinstall an earlier driver version.

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Install HP LaserJet P1108 printer in Ubuntu 12.04

Visit the following page to install HP Laserjet P1108 in Ubuntu 16.04 / Debian 8.
http://linuxhalwa.blogspot.in/2017/06/install-hp-laserjet-p1108-printer-in-ubuntu.16.04.html

You can find that HP LaserJet P1108 do not work simply adding printer with Ubuntu 12.04. You have to execute following commands to configure the printer. 


sudo apt-get install python-qt4
sudo apt-get install hplip-cups
sudo hp-setup -i

User settings,

sudo adduser vimal lp
sudo adduser vimal lpadmin

Replace vimal with your user name. 

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Install Drupal on Ubuntu 12.04

Drupal is an Open Source content management system. Drupal is very powerful, flexible and popular among web developers. Whitehouse website build on Drupal.

Now Drupal is now available with Ubuntu 12.04 software repository and very easy to install. Please follow the instructions to install Druapl on your Ubuntu 12.04 server or desktop.

Install LAMP server
LAMP package contain MySQL, Apache and PHP.

apt-get update
apt-get upgrade
apt-get install lamp-server^

Enter MySQL root password during installation. 

Enable rewrite function in Apache,

sudo a2enmod rewrite
sudo service apache2 restart

Install Drupal

apt-get install drupal7

Check which version of Drupal is available latest and change version number.

Add Drupal configuration for Apache,

sudo cp /etc/drupal/7/apache2.conf /etc/apache2/mods-enabled/drupal.conf

Restart Apache

sudo service apache2 restart

Open a browser and type the address and proceed with installation process,

http://127.0.1.1/drupal7/install.php

Update Drupal to latest version using Drush
Drush is a command line shell and scripting interface for Druapl.

sudo su 
apt-get install drush

Check new Drupal updates available. Enter inside the Drupal installation place and apply following commands.
cd /usr/share/drupal7
drush up -n | grep available
drush up

Information courtesy: https://help.ubuntu.com/community/Drupal

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To know wireless card information in your laptop?

To find wireless card model number is essential to install suitable driver. Execute following command in a terminal to display wireless driver information,

lspci | grep Network

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List of Brothers printers compatible Google Cloud Print

Here is the list of Google Cloud Print™ compatible with Brother products.


Brother Laser HL:
HL-3140CW
HL-3150CDW
HL-3150CDN
HL-3170CDW


Brother Inkjet DCP 3 in 1:

DCP-9020CDN
DCP-9020CDW
DCP-J752DW
DCP-J552DW
DCP-J552N
DCP-J552N -ECO
DCP-J752N
DCP-J952N -B
DCP-J952N -W
DCP-J952N-ECO-B
DCP-J952N-ECO-W
DCP-J957N-B
DCP-J957N-W
DCP-J957N-ECO-B
DCP-J957N-ECO-W
DCP-J152W
DCP-J152N


Brother Laser MFC 4 in 1:

MFC-9130CW
MFC-9140CDN
MFC-9330CDW
MFC-9340CDW


Brother Inkjet MFC 4 in 1:
MFC-J470DW
MFC-J475DW
MFC-J870DW
MFC-J875DW
MFC-J285DW
MFC-J450DW
MFC-J650DW
MFC-J870N
MFC-J980DN -B
MFC-J980DWN -B
MFC-J980DN -W
MFC-J980DWN -W
MFC-J820DN
MFC-J820DWN
MFC-J890DN
MFC-J890DWN
MFC-J6720DW
MFC-J6920DW

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How to fix error C0610 on Kyocera Mita

Solution 1:

• Check if the Dimm is inserted into the socket on the main PWB correctly.

Solution 2:

• Replace the Dimm by a new one.

Solution 3:

• The main PWB is defective
• You need to replace it.

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The Epic iPad Stand Journey

There once was a student named Cole, who wanted to design and print an iPad stand. Little did he know just how epic his journey would be...

Definition of ITERATION
1:  the action or a process of iterating or repeating; as in a procedure in which repetition of a sequence of operations yields results successively closer to a desired result

__________________________________

Here is a summary of our progress so far:

ATTEMPT #1:  iPad stand design using SketchUp (late September)

PROBLEM #1: Those non-manifold edges will get you every time.  Despite his best efforts (and those of the netfabb repair), he could not produce a closed surface model.

SOLUTION #1:  Cole redesigned the entire thing on TinkerCAD, which we've found very closed-surface friendly.  In fact, the students almost entirely use TinkerCAD for their models, just because it produces such reliable stl files.  Despite there being a hold up with TinkerCAD student accounts....

OUTCOME #1: The model was closed, watertight, and ready to go!

__________________________________

ATTEMPT #2: Redesigned on TinkerCAD.  Printed on the Makerbot (Oct 6) after a lengthy gcode generation.  At 25% fill, this will be an estimated 17 hour 22 minute print job. I started it early (like 5 am early) in the morning.  It seemed to be working quite well.  Cole has really pushed our Makerbot to its limits... literally.  Since the build took up the entire build plate, part of the raft even hung off the edge of the heated bed.

PROBLEM #2: By 11 am, the filament must have gotten pinched on the spool, since a student yelled out, "Ms. Mytko, something is WRONG with the PRINTER!  It is just printing AIR!"  Ends up, the feed tube is loose (since the plastic clamps that are supposed to hold it down were broken on day 1 ... I prefer to say they were "over-loved" by the middle school kids).  In any case, with the motion of the nozzles, the tube was slipping down until it caused the filament to get caught in the spool.  While our temporary solution of rubber bands had apparently been working for short-term prints, it appears this long-term print was going to be an issue. The tube seemed to slip down every couple of hours, causing the filament to pinch.

Here are a few more pics from the event: 

So cool - the entire ballpark was filled with science!  And we were thrilled to be part of it (view the map)! :)

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