You use the Xfce4 desktop environment (e.g. with Manjaro), and you want to change the desktop wallpaper from the command line.
Get the path of the current wallpaper:
$ xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitorLVDS-0/workspace0/last-image /trash/wallpapers/hd_wallpapers_forbackground_2015.jpg # sample output
Set the wallpaper to a new background image:
$ xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitorLVDS-0/workspace0/last-image -s PATH_OF_NEW_IMAGE
PATH_OF_NEW_IMAGE is the path of the image you want to set.
(This paragraph is based on this post). How to list Xfce channels and their properties:
for channel in $(xfconf-query -l | grep -e '^\s'); do echo "Channel: $channel"; xfconf-query -c $channel -l; echo ''; done
This will give you a full listing of all the properties of each channel. You can query the value of a property this way:
xfconf-query -c <channel> -p <property>
Here (reddit post) you can find a torrent file that points to an 18 GB archive that contains 38,000+ quality wallpapers. The images are collected from imgur.
I downloaded it and put their imgur IDs on Gist, see here.
This script worked fine, but a few months ago it stopped updating my desktop. Today I had some time and tracked down the problem to the
gsettings command. The script sets the background with this external command:
gsettings set org.gnome.desktop.background picture-uri file:///absolute/path/to/image.jpg
When I launched the script manually, the background was refreshed. However, when it was called from crontab, the background was not refreshed.
gsettings actually set the new image, but the background was not refreshed, so I still saw the old image. Wat?
I found the solution here. As Radu Rădeanu points out, the only environment variable that is required to run the script correctly as a cron job is the
GSETTINGS_BACKEND or something else.
Here is how to set the value of DBUS_SESSION_BUS_ADDRESS:
PID=$(pgrep gnome-session) export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ|cut -d= -f2-)
Now my crontab file looks like this:
HOME=/home/jabba DISPLAY=:0 PYTHONPATH=$PYTHONPATH:$HOME/python/lib/jabbapylib 0 0 * * * $HOME/bin.python/bing.sh
The source of bing.sh:
#!/usr/bin/env bash HOME=/home/jabba DISPLAY=:0 PYTHONPATH=$PYTHONPATH:$HOME/python/lib/jabbapylib PID=$(pgrep gnome-session) export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ|cut -d= -f2-) DIR=$HOME/Dropbox/python/lib/jabbapylib/jabbapylib/apps $DIR/bing.py >>$HOME/bing.log.txt
You browse the web and you find a nice image file. “Hey, it’d look cool on my desktop!” Or, you browse your local image files: “Hey, I want to see it as my wallpaper!” How to set a background image painlessly?
With jabbapylib, of course :) Just use my new little script:
# the image is on the web: set_wallpaper http://i.imgur.com/t1FRG.jpg # the image is a local file: set_wallpaper sunshine.png
Under Gnome you could set the wallpaper from command line with the following commands:
gconftool-2 --type=string --set /desktop/gnome/background/picture_filename /path/to/image.jpg gconftool-2 --type=string --set /desktop/gnome/background/picture_options stretched # stretch the image
You try it again on a newer Ubuntu that uses Unity, and nothing happens! What’s going on?
The new way of setting a wallpaper is this:
gsettings set org.gnome.desktop.background picture-uri file:///path/to/img.jpg
Notice that you must provide a URI, hence the “
The first snippet works with Gnome 2. The second one is for Gnome 3. To figure out your Gnome version, launch the command “
Update (20110915): The project has changed a lot since its first release, thus the original post here got completely outdated. I rewrote this blog entry to reflect the current state of the project.
The goal of this project is twofold. First, download images from a wallpaper site. Second, rotate the downloaded images as wallpapers.
Here is the list of changes that I added to the original version:
- New! XML support is dropped. For setting the images as wallpapers, use the script
- New! Support for 4walled.org is added!
- New! Support for wallbase.cc is added!
- Large images can be resized to fit your screen resolution. By default, the maximum width of images can be 1920 pixels. You can customize it in the config file. It’s recommended, this way the images will occupy much less space on your hard drive.
- You can specify several categories and the downloader will grab images from all these sites. The same is true for rotator: you can specify several categories and it will pick a random image from the whole list. See the config file for more details.
- The project includes an automatic wallpaper changer script called
02_wallpaper_rotator.py. You don’t need any third-party managers anymore.
- You can choose from several categories. You can also specify your favorite category.
- Screen scraping is done with the BeautifulSoup library.
- The most important change is the filtering of images that are unsuitable as wallpapers, i.e. small images, portrait images, and images with strange ratio are removed from the list.
- Support for Flickr images (zioyero’s patch).
- The URLs of the downloaded images are strored in an SQLite database. This way an already fetched image (either good or bad) won’t be downloaded again.
Supported wallpaper sites
First, you might want to customize some settings in the
config.py file. The most important thing is the
PHOTO_DIR directory, i.e. where to store the downloaded images. Create this directory if it doesn’t exist. Then, simply launch the script:
You can also add it to your crontab:
$ crontab -e 10 */2 * * * /absolute_path_to/01_wallpaper_downloader.py
Add the second line to the end of the crontab list. Here the script is called at every two hours (at 0h10, 2h10, etc.).
For setting the images as wallpapers:
That is, just launch it in the background. It uses the same config file as the wallpaper downloader. I put it among my startup applications, thus it starts automatically.
You can download the script from https://github.com/jabbalaci/Wallpaper-Downloader-and-Rotator-for-Gnome.