Category Archives: Homeschool

Ubuntu Linux: CD-Record Has No Permission To Open Device

If you are receiving common Linux error: cdrecord has no permission to open the device:

  • Open Terminal
  • Type: sudo chmod 777 /dev/scd0
  • Replace “/dev/scd0” with your device

Remember: chmod 777  grants full permission to a folder. The 777 mask indicates that read, write, and execute permission given to all users.

Searching A Specific File Format In Google

On Internet there are millions of files with different formats. Google recognizes them and hence you may search web for a specific file format. Likewise if you want to search certain book in PDF format then you should type the book’s name (in double quotes) followed by filetype and then book’s format in Google’s search box as show in the following given example:

Example: If you want to search book After The Software Wars in PDF format on world wide web:

Type as show below in Google’s search box

“After the Software Wars” filetype:PDF

Highlights Of WordPress Green


BSNL Launches 3G pocket Router For Just Rs. 5,800

BSNL launched the 3G wireless pocket router with best buy price of just Rs.5,800 with following features.


  • Works under a single SIM card.
  • No need to connect more than one device.
  • 3G network would be available in more than 850 cities.
  • Plan voucher of Rs 60 which comes bundled with 1GB free data usage.