How to randomly change lightdm background.
The next thing I came up with for myself was to random change the lightdm background every hour in addition to dynamic wallpaper and random pic for betterlockscreen.
So I was prepared to search the internet for single fragments and then make a script from them, etc …
Though … The first search action showed me the following website.
A blog by someone who very finely, in detail, explains how to change the background easily.
For my purpose, I choose scenario 3.
Scenario 3 : random LightDM background.
Read blog first…
Below are the steps without further explanation.
- FIRST STEP. Copy one picture into pixmap folder. [background.XXX]
XXX stands for jpg or png.
$ sudo cp ~/.backgrounds/background.XXX /usr/share/pixmaps/
$ sudo chown -R <USERNAME>:users /usr/share/pixmaps/background.XXX
- SECOND STEP. Edit lightdm config. Set background.XXX
$ sudo nano /etc/lightdm/lightdm-gtk-greeter.conf
[greeter]
theme-name = Adwaita-dark
icon-theme-name = HighContrast
position = 16%,center 40%,center
screensaver-timeout = 50
background = /usr/share/pixmaps/background.XXX
default-user-image = /usr/share/pixmaps/xterm-color_48x48.xpm
user-background = true
Lines of interest.
background = /usr/share/pixmaps/background.XXX
user-background = true
- THIRD STEP. Create random pix script.
#!/bin/bash
cd /usr/share/pixmaps
# backgrounds path
background_home=${HOME}/.backgrounds
# Shuffle backgrounds and pick one
background=$(ls $background_home | shuf -n 1)
# Replace current LightDM greeter background
cp $background_home/$background background.XXX
- I removed the SLEEP part from the script.
- I decided to use CRONTAB for this purpose. A random picture every hour.
$ chmod +x script.random.pix.sh
$ cp script.random.pix.sh ~/bin
$ crontab -e
# ~~~~
0 * * * * DISPLAY=:0 /home/<USER>/bin/script.random.pix.sh
# ~~~~
$ crontab -l
From now on background of LightDM background changes every hour.
Credits to Edwin Wenink
Have 
fFUnNn …