Skype for Linux beta doesn’t add the repository public key to apt on Ubuntu

W: GPG error: stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1F3045A5DF7587C3
W: The repository ' stable InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@computer:~# apt-key adv --keyserver --recv-keys 1F3045A5DF7587C3
Executing: /tmp/tmp.UA1ZzOZ6hE/ --keyserver
gpg: requesting key DF7587C3 from hkp server
gpg: key DF7587C3: public key "Skype Linux Client Repository " imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)

How to watch a video from your computer on a Google Cast device? (Ubuntu Linux)

1) Install smplayer (

To install SMPlayer, just run these commands in a terminal:

$ sudo add-apt-repository ppa:rvm/smplayer
$ sudo apt-get update
$ sudo apt-get install smplayer smplayer-themes smplayer-skins

Continue reading “How to watch a video from your computer on a Google Cast device? (Ubuntu Linux)”

How to disable framebuffer in Ubuntu?


GRUB_CMDLINE_LINUX_DEFAULT="video=640x480 fb=false"
# apt-get install fbset
# usermod -a -G video username

To resize the virtual console during a tty login, enter the following in $HOME/.bash_profile:

if /usr/bin/tty | /bin/fgrep tty >/dev/null 2>/dev/null
        /bin/fbset -g 640 480 640 480 32

My samba configuration

Disable offloading for the network interface eth1:

# /sbin/ethtool -K eth1 tso off
# /sbin/ethtool -K eth1 gso off

Continue reading “My samba configuration”

Change Adblock Plus key binding (ctrl+shift+v) in Firefox

Open about:config and edit extensions.adblockplus.sidebar_key

Can not use mate desktop with x2go on Ubuntu 16.04

Add the following to $HOME/.profile:

export GSETTINGS_SCHEMA_DIR=/usr/share/mate:/usr/local/share:/usr/share
export XDG_DATA_DIRS=/usr/share/mate:/usr/local/share:/usr/share

Can not use x2go single application mode on Ubuntu 16.04

# systemctl stop x2goserver

Add 'X2GO_NXAGENT_DEFAULT_OPTIONS=" -extension BIG-REQUESTS"' to /etc/x2go/x2goagent.options

# systemctl start x2goserver


The error message for this problem was a bit vague:

Error: Failure reading from the peer proxy.
Error: Connection with remote peer broken.
Error: Please check the state of your network and retry.

Linux devices and drivers

How to list the devices and kernel modules your system uses:

$ lspci -vnnk | grep -e ]: -e driver

Problem with vlc and Intel integrated GPU

If you experience a problem with vlc so that the video is always on top of any other program, this xorg config snippet will help.

Add the following to /usr/share/X11/xorg.conf.d/20-intel.conf:

Section "Extensions"
    Option "XVideo" "Disable"

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