Reset your Ubuntu Desktop to its default settings

Posted on April 18, 2019 by 
dconf reset -f /

Sources:

https://www.omgubuntu.co.uk/2017/10/how-to-reset-ubuntu-desktop-to-default

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How to check the DHCP server on Ubuntu

Posted on April 3, 2019 by

This is if you need to know which server gave you your dynamic IP:

cat /var/lib/dhcp/dhclient.leases

That’s it, Enjoy!

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Change default storage location of docker containers on Ubuntu 18.04 and 18.10

Posted on April 2, 2019 by

This was tested on Docker version 18.09.4, build d14af54266, it includes ALL docker data.

Just edit/create a file inside /etc/docker named daemon.json and add the following:

{
  "data-root": "/new_location"
}

then simply restart docker:

sudo service docker restart

Source:

https://docs.docker.com/engine/reference/commandline/dockerd/

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Print a batch of files on Ubuntu 18.10

Posted on February 18, 2019 by

Here we will send a batch of files inside a directory to the default printer in Ubuntu.

First of all, you’d better define a default printer in your system by going to Printers and then select Use Printer by Default:

Next, just invoke the lpr command, e.g.

lpr *.pdf

That’s it, Enjoy!

Source: https://makandracards.com/makandra/24202-linux-how-to-print-pdf-files-from-the-command-line

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Touchpad enable/disable script and shortcut on Ubuntu 18.10

Posted on January 29, 2019 by

If your laptop doesn’t have a working switch for turning on/off your touchpad, then this post is for you.

Create a script called disenable_touchpad.sh and add the following code to it:

!/bin/bash

 state=$( gsettings get org.gnome.desktop.peripherals.touchpad send-events )

 if [ "$state" == "'enabled'" ];then
   gsettings set org.gnome.desktop.peripherals.touchpad send-events 'disabled' \
         && notify-send -i touchpad-disabled-symbolic "Touchpad" "Disabled"
 else
   gsettings set org.gnome.desktop.peripherals.touchpad send-events 'enabled' \
         && notify-send -i input-touchpad-symbolic "Touchpad" "Enabled"
 fi

Mark the script as executable and move it to /usr/bin:

chmod +x disenable_touchpad.sh
sudo mv disenable_touchpad.sh /usr/bin/

Open Settings -> Keyboard, scroll to the bottom and press the + sign to assign a new keyboard shortcut:

Tested on Ubuntu 18.10, should work on any gnome-shell versions anyway!

Enjoy!

Sources: https://askubuntu.com/questions/844151/enable-disable-touchpad/1109515#1109515

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How to fix Ubuntu dock still visible while screen is locked on 18.04 and 18.10

Posted on January 27, 2019 by

A very stupid bug that has been there for quite a while! Luckilly the fix has been released recently into the proposed repository for both Bionic & Cosmic (Disco as well).

Just enable the proposed updates from Software & Updates -> Developer Options -> Pre-released updates, then run the following commands:

sudo apt update
sudo apt install gnome-shell-extension-ubuntu-dock

Hit Alt+F2, write r and then press Enter (works for Xorg only, not Wayland)

Enjoy!

Source: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1769383

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Fix QT Apps scaling issue on hidpi screens on Ubuntu

Posted on January 21, 2019 by

On my 5k screen, all QT apps look very tiny, such as keepassxc and Virtualbox.

The best solution I found was adding the following to your .profile to autoscale at a ratio of 2 (you can change it to your preference):

export QT_SCALE_FACTOR=2

Set to 2 because my display settings are set to 2

Log out and back in, and there you go!

Tested on Ubuntu 18.10

Enjoy!

Sources: https://unix.stackexchange.com/questions/433385/scaling-hidpi-issue-for-qt5-applications-under-gnome

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