Youtube-dl

Youtube-dl provide command line interface to download youtube videos. It need python to run.

Syntax: youtube-dl [options] [youtube_url]

It may look hard compared to other downloader, browser add-ons, but it is very useful in case of downloading complete playlist, all video uploaded by a user. we can pass playlist url, user profile url to do so.

we can go further using shell script to automate downloading sequence of videos. we can store the links we want to download in file, then create shell program to fetch each line in that file and pass it as parameter to youtube-dl.

Here is sample script to download sequence of video in webm format.

https://github.com/PraveenVignesh/sequence_download_youtube_dl

Burg – colorful alternative to Grub

burg

Burg is bootloader similar to grub, which contain themes and customization. we can install burg using

sudo add-apt-repository ppa:n-muench/burg

sudo apt-get update

sudo apt-get install burg burg-themes

sudo burg-install “(hd0)”

sudo update-burg

we can change theme using f2. we can check by running emulator, sudo burg-emu.

usually bootloader display many option, we can remove/edit using GUI application grub customizer. it provide different option customizing grub, burg.

when we install additional OS, update ubuntu or other, it replace default boot loader. we can get back burg by running, sudo burg-install /dev/sda 

useful link:

http://www.unixmen.com/how-to-install-burg-boot-loader-in-ubuntu-1304-and-linuxmint/

brightness control is not working in ubuntu

I am using acer aspire e1531, ubuntu 13.10. I cannot adjust brightness of screen, it show symbol of decreasing brightness, but no effect in screen. Not only in ubuntu 13.10, but also in ubuntu 13,04. I control brightness using command.

echo 600 | sudo tee /sys/class/backlight/intel_backlight/brightness

you can change value from 1 – 976 (for my laptop model, you can see upper bound of brightness value using command, cat /sys/class/backlight/intel_backlight/max_brightness).