Most of the GTK+ themes need their own theme engine, make sure you have that theme engine installed with the same prefix as the GTK+ toolkit. 1. During the installation, select gdm3 as the default display manager: After the process is complete, restart the computer. To install LXDE on Ubuntu 18.04, open the terminal and install the lubuntu-core package: sudo apt-get update sudo apt-get install lubuntu-core. It will install both the icon and desktop themes. The Color tab allows you to set custom colors for your LXDE widget theme. Any themes which you have installed yourself will appear in this window. If you want to install any other theme than the Paper themes, use the same command but replace paper-*.deb with the name of your downloaded deb file. Install the LXDE group: su -c 'yum install @lxde-desktop' Graphical Interface. The download is 26.1 megabytes and it uses 72 megabytes on disk. ↳ Installation and Upgrade of LXDE ↳ Hardware & Laptops with LXDE ↳ Networking & Wireless ↳ LXDE Components ↳ LXPanel ↳ LXSession (Lite) ↳ LXAppearance ↳ GPicView ↳ LXTerminal ↳ LXNM ↳ PCManFM ↳ LXDE Development & Programming ↳ LXDE Design Project ↳ LXDE Translation Project ↳ Partner Repository For gnome shell, you can install the gnome-tweak-tool: sudo apt-get install gnome-tweak-tool For Ubuntu unity, you can either install the gnome-tweak-tool or you can use the unity-tweak-tool to change themes: sudo apt-get install unity-tweak-tool Download and extract all themes to your ~/.themes directory. Note that this may take a while to complete, on my installation 107 new packages were required taking up 136MB of space so it was pretty quick. Many widgets cannot accept custom colors, so you may have to change your widget theme to use custom colors. A GTK+ theme is the theme of the toolkit (buttons, textfields, etc). Few LXQt theme blends better with some specific Qt widget style, GTK+ themes and icon themes. [email protected]:~# apt-get install lxde. Run the following command to install both Lubuntu’s customized LXDE and vanilla LXDE on Ubuntu: sudo apt-get install lubuntu-desktop. Well the word "best" is not much suitable here, as themes are a subject of personal choice. The Icon Theme tab allows you to change your system icons. To activate your newly installed theme you need to go to Menu -> Settings -> Appearance. Enter the following command to install Xorg. The “Customize Look and Feel” utility, found under Preferences in the menu, allows you to customize LXDE’s theme and appearance settings. An experimental GTK 3 build of LXDE can be installed with the lxde-gtk3 group. Install LXDE. Still few themes are better designed compared to others. Download the Theme; Extract the zip file to the themes directory, i.e., /usr/share/themes/or ~/.themes/ (create it if necessary in your Home Directory). Ubuntu Tweak Tool doesn’t come pre-installed in the system. Configure the newly installed Xfce themes. Like this: Then now choose the openbox themes … LXDE is the light weight graphical user interface installed in the full version of Raspbian. LXDE is built on Xorg. To install and use a theme, follow these steps: In the left side pane choose LXDE desktop. Lush. Go to System > Administration > Add/Remove Software. Click Apply to install the package set. sudo apt-get install xserver-xorg Apply this Theme in Ubuntu Tweak Tool or Distro specific Tweak Tool. We will install it here without all the extras, the games and other junk. To install the themes is same as above lxde theme, just copy folder to .theme, but if you have obt file just install it from openbox configuration manager. Using LXDE GDM or KDM. After a system reboot at the login screen, select the cog icon followed by LXDE as shown below, and login. While it works mostly, there are some known issues with gpicview , lxappearance-obconf , … So, here's the concept of "best themes", and hope it makes sense.