How to install FFmpeg on Ubuntu 14.04

FFmpeg has been removed from Ubuntu 14.04 and was replaced by Libav. This decision has been reversed so that FFmpeg is available now in Ubuntu 15.04 again, but there is still no official package for 14.04. In this tutorial, I will show you how to install FFmpeg from mc3man ppa. Add the mc3man ppa:

sudo add-apt-repository ppa:mc3man/trusty-media

And confirm the following message by pressing <enter>:

Also note that with apt-get a sudo apt-get dist-upgrade is needed for initial setup & with some package upgrades
More info:
Press [ENTER] to continue or ctrl-c to cancel adding it

Update the package list.

sudo apt-get update
sudo apt-get dist-upgrade

Now FFmpeg is available to be installed with apt:

sudo apt-get install ffmpeg

Disable IPv6 networking on CentOS

Follow these steps to disable IPv6 on CentOS. Edit the /etc/sysctl.conf file, I will use the nano editor here:

nano /etc/sysctl.conf

And add the following line at the end of the file:

net.ipv6.conf.all.disable_ipv6 = 1

Then run:

sysctl -p

to load the new settings.

The next step is to edit the network card configuration file (/etc/sysconfig/network-scripts/ifcfg-eth*) and add or edit the setting IPV6INIT so that it is set to "no".


Now edit the file /etc/sysconfig/network:

nano /etc/sysconfig/network

And set the NETWORKING_IPV6 option to "no":


Then restart the server.

How to extract tar.gz files

The command to extract tar.gz files is:

tar xzf myarchive.tar.gz

The tar command options explained

  • [x] The x stand for extract, it is mandatory when a tar file shall be extracted.
  • [z] The z option tells tar that the archive that shall be unpacked is in gzip format.
  • [f] This option instructs tar to read the archive content from a file, in this case the file myarchive.tar.gz.

The above tar command will silently extract that tar.gz file, it will show only error messages. If you like to see which files get extracted, then add the "v" option.

tar xzvf myarchive.tar.gz

The [v] option stands for verbose, it will show the file names while they get unpacked.

Extract tar with tar xzf

Windows 10: What is the $WINDOWS.~BT folder used for?

This folder is used by the Windows 10 Updater, it contains update logs and files downloaded by the Windows update process.

How to delete the $WINDOWS.~BT folder?

The folder can be deleted e.g. when an upgrade from windows 7 / 8 to Windows 10 failed and you want to free up space on the hard disk. This folder is protected, you can't remove it with the Windows Explorer. Use these steps:

Open a terminal Window in administrator mode and run the command


Source: Microsoft Answers

How to disable the “Get Windows 10” icon in the notification area?

The “Get Windows 10” icon in the tray has been installed as part of the KB3035583 Windows update.

To remove that icon permanently uninstall this update in the windows software center. The Windows update function might offer this update again in future, so don't forget to hide it in Windows update so that it does not come back.

If you still see the icon after uninstalling and a reboot, then check if there are still files of the update in C:\Windows\System32\GWX. If that's the case, delete this directory.