I have 4GB RAM. When I open Firefox, IntelliJ IDEA or VS Code and some other application my memory is about used up thus my machine hangs and I can't do anything. I can't even close any applications.

Date and time are shown in the top bar so that I can view it any time without any thing typing.

If I would view memory status in this way without typing anything then I can make a decision whether to open an application or whether this application may put my machine in hanging state or not.

Is it possible in Ubuntu 18.04 LTS?

  • VS Code is a unique twist. Are we talking thousands or millions of lines of code? – WinEunuuchs2Unix Aug 8 '18 at 3:35
  • This question is of use to a large audience regardless VS Code. – matanster Nov 30 '19 at 12:22

As pointed out in the other post you want to install the Gnome Shell Extension system-monitor There's a browser plugin and integrations that can allow you to install it from the browser or from the software center as mentioned by @pomsky.

However I've found that the easiest way to install it is to just install it from apt using the debian package

sudo apt-get install gnome-shell-extension-system-monitor

This will also pull in all the required dependencies, and after a reboot or log out the system monitor was in the top task bar.

enter image description here

(Note that I think I enabled the swap manually before taking the screenshot.)

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    I see nothing added after a reboot. I've taken the apt install approach suggested here, on Ubutnu 18.04 and am using its default gnome version. What do you consider to be the top task bar? – matanster Nov 30 '19 at 12:17
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    please note that for this solution the user should use the default gnome shell and they also should restart their machine (not just lock-unclock). – john gonidelis Mar 10 at 14:15
  • I believe that you should only need to restart your gnome session for which logging out is adequate. Locking the screen is not logging out. You get a very similar login prompt, but as you noticed it doesn't restart your session so you don't get the new settings. – Tully Mar 11 at 16:59

You may try a GNOME shell extension called "system-monitor". It does

Display system informations in gnome shell status bar, such as memory usage, cpu usage, network rates…

enter image description here

"system-monitor" depends on a few packages. To install them, run

sudo apt install gir1.2-gtop-2.0 gir1.2-networkmanager-1.0 gir1.2-clutter-1.0

Then log out and log in again.

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    I run this command and log out and log in but nothing is shown. – alhelal Jul 18 '18 at 9:07
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    I am in doubt whether it is a web extension or desktop app. Your addressed answer give only browser solution. If it is web app why I need browser setting to install. – alhelal Jul 18 '18 at 9:23
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    @alhelal Then open "(GNOME) Software" (the software store application) and search for "system-monitor". – pomsky Jul 18 '18 at 9:33
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    @RingØ No, you're confusing two different things. gnome-system-monitor rather confusingly is the GUI application called "System Monitor" which is usually pre-installed and can be found in "Show Applications". This one is a GNOME shell extension called "system-monitor", see its homepage. To verify this, run the command gnome-system-monitor in Terminal, the GUI app "System Monitor" will launch. This extension also lets you launch the GUI app "System Monitor" (the button above "preferences" in the screenshot). – pomsky Aug 22 '18 at 18:39
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    @D.Ror. There's nothing suspicious per se. First "system monitor" is a simple, descriptive, and easily understood term. Secondly gnome-system-monitor doesn't have a specific icon of its own, it just uses the generic utilities-system-monitor icon provided by the icon set (the same icon is used by other similar apps, e.g. lxtask, xfce4-taskmanager etc.). – pomsky Oct 25 '18 at 6:18

In Ubuntu 18.04 (assuming you're using the default gnome desktop at least) run the gnome Tweaks app. Everything you need to manage for that is there, including what exactly you'd like to see from gnome system-monitor on the dock bar, which you can configure through the settings icon near the on/off switch for system-monitor seen below.

enter image description here

Unfortunately the extension doesn't really fit the dock's default color so it might be a little ugly when you configure to see graphs and not digit values there. So I ended up configuring to show the digit value only for now.

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  • Is Tweaks app installed by default? – Sabrina Aug 26 at 0:11
  • @Sabrina No. – KGIII Aug 26 at 0:29

Based on my experience, there are 2 packages required:

  1. gnome-shell-extension-system-monitor
  2. gnome-tweaks

Luckily, these 2 can be installed easily with the following command:

sudo apt install gnome-shell-extension-system-monitor gnome-tweaks

That's it, problem solved. No reboot required in my case.

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