System Monitor Applet for Gnome Shell - Ubuntu/Fedora

Install System Monitor Applet for Gnome Shell in Ubuntu 11.10 Oneiric Ocelot/Ubuntu 12.04/Fedora

System Monitor is very useful Gnome Shell extension for displaying system information on top-panel, such as memory usage, cpu usage, network rates.

To Install System Monitor Applet in Gnome Shell (Ubuntu/Fedora) just enter the following commands in the Terminal:
Install the dependencies with the following command:

Terminal Command:
sudo apt-get install python3 python3-gobject libgtop2-7 gir1.2-gtop-2.0

1. Now, install git to get the source.

Terminal Command:
sudo apt-get install git-core

Create a folder for git projects and git clone the source:

Terminal Commands:
mkdir ~/git_projects && cd ~/git_projects
git clone git://github.com/paradoxxxzero/gnome-shell-system-monitor-applet.git

2. Create directory of gnome shell extensions and make a link.

Terminal Commands:
mkdir -p ~/.local/share/gnome-shell/extensions && cd ~/.local/share/gnome-shell/extensions
ln -s ~/git_projects/gnome-shell-system-monitor-applet/system-monitor@paradoxxx.zero.gmail.com
cp ~/git_projects/gnome-shell-system-monitor-applet/system-monitor-applet-config.desktop ~/.local/share/applications/

3. Install the schema:

Terminal Commands:
sudo mkdir -p /usr/local/share/glib-2.0/schemas
sudo cp ~/git_projects/gnome-shell-system-monitor-applet/org.gnome.shell.extensions.system-monitor.gschema.xml /usr/local/share/glib-2.0/schemas
sudo glib-compile-schemas /usr/local/share/glib-2.0/schemas

4. Install the configurator:

Terminal Commands:
sudo cp ~/git_projects/gnome-shell-system-monitor-applet/system-monitor-applet-config.py /usr/local/bin/system-monitor-applet-config
sudo msgfmt ~/git_project/gnome-shell-system-monitor-applet/po/YOUR_LANGUAGE/system-monitor-applet.po -o /usr/share/locale/YOUR_LANGUAGE/LC_MESSAGES/system-monitor-applet.mo

5. Now, restart gnome-shell by Alt+F2 and type 'r' and Press Enter (or log-out and log-in back). Go to Advance Settings to enable this extension. If you don't have Gnome Tweak Tool, Install it from here.

Here is the System Monitor Applet Page on GitHub