elementary OS Juno is based on Ubuntu 18.04 LTS. Any system update to core Ubuntu will have affect on elementary OS too. It means when Ubuntu 18.04 has been patched with latest sudo, it will be on elementary OS too. You need update your system then to get the new patch.
From your shared link, It's telling:
The problem can be corrected by updating your ...
@RodrigoN, if your kernel version (which can be displayed in Terminal via uname -r command) is below 5.0.x, and your initial Ubuntu distro was 18.04 or 18.04.1, you don't have HWE installed. As stated here:
"The [HWE] stack consists of a newer Linux kernel [meaning, v5.0], X.org graphical server, and graphics drivers. These weren’t automatically installed ...
You can install the Ubuntu 18.04 LTS Hardware Enablement (HWE) packages in order to get a newer kernel. I've been using this on my Elementary systems for half a year or so without issues (Elementary 5.0 Juno is built from Ubuntu 18.04).
At time of typing this my main system is using 5.0.0-31-generic.
BAD IDEA WARNING!
I believe you will achieve the desired effect by running Files with sudo permissions. To do that, got to Applications -> right-click on Files -> New Window as Administrator -> input your password in the authentication window -> Files is running. You'll be able to move, edit and delete any file you want (EVEN THE CRITICALLY IMPORTANT ONES!)
As far as I understand, kernels do not exist in a vacuum. They rely on the rest of the system components to be compatible with their newer architecture.
Even if newer kernel might be somewhat faster or have new cool features, there's some risk of instability, when you insert a newer kernel into an older system, as newer kernels might not necessarily be fully ...
For me at least, doing:
#echo EHC1 > /proc/acpi/wakeup
Fixed it. But it was the Bluetooth waking the machine after a second or two of suspend. I'd cat the file, and try disabling the values one at a time, followed by an attempt at suspending the machine.
Changes to the file are NOT persistent, so everything in it will be changed to default on reboot. ...
I recommend using CUPS to install the printer:
Visit http://localhost:631/admin/ in Firefox (it will NOT work in Chrome -> see cannot configure CUPS on elementary OS juno
Click on Add Printer
Login with your elementary OS user and password
Choose your printer's connection protocol
Type your printer's path in the Connection filed
Click on ...
As super-wingpanel software appears to be quite old, no wonder its repository (PPA) doesn't have proper release file - i. e. the version, that's been specifically compiled for Ubuntu 18.04 (codename 'bionic', on which elementary OS 5 is based).
To fix this error (i. e. to stop super-wingpanel's further attempts to get non-existent updates, while ...
Trying to open CUPS in Chrome will NOT work (no authentication window is displayed)! This is a Chrome "feature", where they decided to prevent popups from and dialogs when accessing non-https locations. It works though in Firefox and Epiphany. I recommend Firefox, because Epiphany seems to have some issues displaying the button labels :D
You need to set its valign property to center:
Gtk.Switch toggle = new Gtk.Switch();
toggle.valign = Gtk.Align.CENTER;
Also, it's worth having a look at Granite.ModeSwitch
EDIT: I strongly recommend Alessandro Castellani's Vala Tutorials. It covers everithing you need to know to get you started.
Depending on the age of your system, Installing the Ubuntu Bionic Beaver hardware enablement stack might help you.
Otherwise try following the troubleshooting wireless on Ubuntu (since elementary OS uses Ubuntu for it's base)
if it is a broadcom card there's a good chance you'll need to install an external driver.
If your computer isn't showing WiFi at all, you may need to find a driver for your WiFi card. Do a Google search for your make and model and see if someone has built something or has a solution for it. Ubuntu forums are really helpful for this since Juno is built on 18.04.
Also, sometimes my wifi just stops working and running service network-manager ...
Why doesn't it work?
Elementary OS dropped support for GtkStatusIcon and Ayatana [source] (the two tray APIs most applications use). The reason is probably that they wanted to force developers to make their indicator apps eOS-specific, so that they don't ruin the user experience. For this reason, no old indicator app will work with Juno.
To really launch Flameshot after successful installation:
Go to Applications menu > Graphics tab.
Locate Take Graphical Screenshot flameshot icon.
Right-click it and click Add to Dock menu item.
Right-click this icon in the Dock and click Keep in Dock menu item.
To launch Flameshot, use this icon. (You can delete 'Launch Flameshot' icon from the Dock.)
Also, as written on NBC Gold troubleshoot page:
You will need to unblock 3rd party cookies, in order to view video.
(As this is a must, try unblocking 3rd party cookies in your browser, and see if it will enable video streaming.)
I used usb-startup-creator available in xubuntu to create an install-usb for elementary os this week. Worked perfectly!
Or maybe check the bios/uefi/secureboot settings of the laptop. Sometimes laptops are protected to prevent installing other os's than windows...
1) first remove previously added repository:
sudo add-apt-repository --remove ppa:philip.scott/elementary-tweaks/ppa
2) Then add it manually:
right-click Files icon, select New Window as Admin and go to /etc/apt/sources.list.d/;
in that directory, create an empty file and name it philip_scott-ubuntu-elementary-tweaks-bionic.list;
open that file ...
Here's the list of stock PPA that came with elementary OS 5.
Add these lines to your /etc/apt/sources.list file:
deb http://archive.ubuntu.com/ubuntu/ bionic main restricted
deb http://archive.ubuntu.com/ubuntu/ bionic-updates main restricted
deb http://archive.ubuntu.com/ubuntu/ bionic universe
deb http://archive.ubuntu.com/ubuntu/ bionic-updates universe