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How to activate a previously defined wireless connection through cli?

$ nmcli --ask conn up id wlan_ssid

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How to set pulseaudio volume during login? (KDE/pulseaudio)

The default volume level is 100%. This method automatically lowers the volume to 35%.

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How to configure the Windows NTP client?

Set your time zone in Control panel/Date and time

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How to copy multiple directories with powershell?

You can call this script from PowerShell with e.g. filecopy.ps1 copy_source copy_destination.

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

Use the bolded apt-key command to add the GPG public key.

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

1) Install smplayer (http://www.smplayer.info/en/downloads)

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

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How to (almost) disable the framebuffer in Ubuntu?

Edit 20170920: You can disable the framebuffer by adding
nomodeset vga=0 but that disables for example your Intel graphics card.

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My samba configuration

Disable offloading for the network interface eth1:

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

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

Open about:config and edit extensions.adblockplus.sidebar_key

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