How do I get more information why a specific extension is not working and showing me "Error loading extension" when trying to enable it?

I found this startup application in Ubuntu 17.10 and I am wondering what it's for.

I would like to display the week numbers in the calendar that is shown in Ubuntu with GNOME shell v3.26 when clicking on the date in bar at the top of the screen.

Some of my applications don't work on Ubuntu 17.10 Wayland. How can I switch back to Xorg?

I really like Hot Corners. :-)

Is it somehow possible to run a custom command on a hot corner as shown below?

I am looking for a countdown timer software that minimises to tray while running and thus hiding any active window.

I am very fond of Tea Time, however, it does not minimise to tray and keeps an active window while running.

Some potential ideas (thanks Rinzwind):

• Add a countdown feature that sits in the panel and keeps counting down)
• Optionally even residing in the launcher and having an icon go 10,9,8...,1,"beep" (that's actually what Tea Time does)

I am looking for a command to track the time.

I imagine the following workflow:

1. Run the command
2. ...do something else...
3. Return to the terminal window and stop the command
4. As an output you receive the time elapsed between 3 and 1

I have upgraded from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS. I was surprised to see that the context menu entry "Make Link" (keyboard shortcut Ctrl+M) in Nautilus doesn't seem to exist anymore. It used to appear upon right mouse click on a file or folder and allowed the user to create a symbolic link.

I would like to remove a Bluetooth device that is shown in the indicator menu but does not appear in the Bluetooth settings menu.

Screenshots

I use the command $ nohup ... to start an application in the background so that I can close the terminal window afterwards.

Upon execution it creates the file ~/nohup.out.

Example:

orschiro@x230:~$ nohup /bin/bash -c "sleep 15 && python3 /home/orschiro/bin/show_state.py"
nohup: ignoring input and appending output to 'nohup.out'

How can I prevent nohup from creating nohup.out?

What is the quickest way to quickly disable the standby feature when closing the lid? I very much like this behaviour but especially when playing music, I would like to close my lid without switching my machine into standby.

However, I do not want to permanently disable this feature but just temporarily turn it off until I finished listening to music, for example.

Maybe there is an indicator similar to Caffeine?

I just noticed an empty folder called snap in my user's home directory. What is this folder being used for?

I keep receiving the following notification about new updates:

If I then run the Software Updater, however, I don't receive any of these updates on Ubuntu 16.04.

Does someone have the same problem?

Example use case:

I run Chromium with a couple of tabs open and decide that I don't need to access the application for the next 20 minutes. In order to conserve laptop battery time, I would like to hibernate (freeze) Chromium without having to close the application (re-opening and re-loading all tabs requires time that I would like to save by hibernating it).

I have a file.img file that I want to convert to file.iso.

The tool ccd2iso does not seem to work for this task:

Unrecognized sector mode (0) at sector 0!

I ensured that the img file is not corrupted.

Is it possible to preserve my open tabs between closing and opening of Nautilus file manager?

Preferably even across different logouts and restarts.

Exemplary use case:

I would like to start Telegram Desktop periodically every 3 hours for 15 minutes, to check for newly incoming messages. After 15 minutes, the application should close again and re-launch after the next 3 hours.

I'm looking for a graphical or command line program that provides me with the following workflow:

1. Start a 25min session
2. After 25min screen is automatically locked for 5min (or maybe just turned black?)
3. Now I'm helped to take a break because I cannot do anything in front of the computer other than looking at a black or locked screen :)
4. After 5min, the screen automatically returns and I can continue work

Is there a program that does exactly this?

Is it possible to backup the custom keyboard shortcuts and restore them when doing a fresh install?

I installed the latest Spotify version 1.0.14.124.g4dfabc51. I noticed that version => 1.0 no longer seem to show a tray icon indicator, and thus their windows cannot be minimised.

Is there a way to bring back the tray icon indicator in these versions?