Gnome has a system monitor panel applet that can be seen even when all your windows are maximized:
Is there anything similar for Xubuntu / XFCE?
Gnome has a system monitor panel applet that can be seen even when all your windows are maximized:
Is there anything similar for Xubuntu / XFCE?
You can install Multiload-ng or XFCE4-hardware-monitor-plugin as all-in-one solution. Also some separate solutions are in the xfce4-goodies package.
Actually, after building Multiload-ng correctly on XFCE desktop environment, there will be three apps from this package:
So, you can use Multiload-ng-systray version even if your panel is not supported or you can not resolve some panel-specific dependencies (in such case remove --disable-autostart option during build).
Update your OS:
sudo apt update
sudo apt upgrade
Install dependencies (depends on your system, check for warnings and errors during build). Tested on:
sudo apt install git autotools-dev automake libtool intltool libgtk2.0-dev xfce4-panel-dev
sudo apt install git autotools-dev automake libtool intltool libgtk2.0-dev libxfce4panel-2.0-dev
Clone source code:
git clone https://github.com/udda/multiload-ng
Build (check for warnings and errors):
cd ~/multiload-ng
./autogen.sh
./configure --disable-autostart
make
Install:
sudo make install
Update your OS:
sudo apt update
sudo apt upgrade
Install dependencies (depends on your system, check for warnings and errors during build). Tested on:
sudo apt install git libgtkmm-2.4-dev libgnomecanvasmm-2.6-dev libgtop2-dev libxfce4ui-1-dev build-essential libgtk2.0-dev xfce4-panel-dev intltool
Clone source code:
git clone https://git.xfce.org/archive/xfce4-hardware-monitor-plugin/
Build (check for warnings and errors):
cd ~/xfce4-hardware-monitor-plugin/
./autogen.sh
./configure --prefix=/usr
make all
Install:
sudo make install
The screenshot below also includes xfce4-weather-plugin and xfce4-datetime-plugin from official repo.

Try using Multiload-ng, it is a bit old but it works on Xubuntu 20.04.
You will need to compile it yourself tho.
Sure there are.
System Load Monitor, CPU Graph and Network Monitor are panel plugins of Xfce. They can be installed as dependencies by installing xfce4-goodies package. And you add the panel items by first right-clicking on panel or by using Panel dialog.
If you don't want to compile by yourself, you can download multiload-ng focal (20.04) binaries to a 22.04 system. It works on my Xubuntu 22.04 desktop. But note that there will be no security updating for these packages.
Download xfce4-multiload-ng-plugin_1.5.2+git20210103-1~webupd8~focal2_amd64.deb and multiload-ng-common_1.5.2+git20210103-1~webupd8~focal2_all.deb from PPA first:
Then install them:
sudo dpkg -i multiload-ng-common_1.5.2+git20210103-1~webupd8~focal2_all.deb
sudo dpkg -i xfce4-multiload-ng-plugin_1.5.2+git20210103-1~webupd8~focal2_amd64.deb
Also install missing dependencies:
sudo apt install -f
After the installation, you will see Multiload-ng item in "Add New Items" from "Panel Preferences":