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main
Adam Douglas 2 years ago
commit 9e4f01f893

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WALLPAPER_DIR=/home/adam/Pictures/wallpaper

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[Unit]
Description=Rotate GNOME wallpaper
[Service]
Type=oneshot
Environment=DISPLAY=:0
Environment=WALLPAPER_DIR=/home/%u/Pictures/wallpaper
EnvironmentFile=-/home/%u/.config/systemd/user/gnome-rotate-wallpaper.conf
ExecStart=/bin/bash /usr/local/bin/gnome_rotate_wallpaper
[Install]
WantedBy=default.target

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[Unit]
Description=GNOME rotate wallpaper
[Timer]
OnCalendar=*:0/1
Persistent=true
Unit=gnome-rotate-wallpaper.service
[Install]
WantedBy=default.target

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# Rotate Gnome Wallpaper using Systemd
- **Note:** Adjust paths as applicable to the desired OS.
- **Note:** The "$" represents the terminal prompt.
- **Note:** Verified to work on Arch Linux with Gnome v3.14.
## Installation Instructions
1. Download "gnome-rotate-wallpaper.service", "gnome-rotate-wallpaper.timer" and "gnome_rotate_wallpaper".
2. Move the 3 files to where Systemd user files are stored.
```bash
$ mv gnome-rotate-wallpaper.service gnome-rotate-wallpaper.timer /etc/systemd/user/
```
3. Move the BASH script "gnome_rotate_wallpaper".
```bash
$ mv gnome_rotate_wallpaper /usr/local/bin/
```
4. Set execute permissions.
```bash
$ chmod +x /usr/local/bin/gnome_rotate_wallpaper
```
5. Enable the timer.
```bash
$ systemctl --user enable gnome-rotate-wallpaper.timer
```
6. Verify the timer is enabled.
```bash
$ systemctl --user list-unit-files
gnome-rotate-wallpaper.service disabled
gnome-rotate-wallpaper.timer enabled
2 unit files listed.
```
7. Start the timer.
```bash
$ systemctl --user start gnome-rotate-wallpaper.timer
```
8. Verify the timer has been started.
```bash
$ systemctl --user list-timers
NEXT LEFT LAST PASSED UNIT ACTIVATES
Thu 2016-03-10 18:49:00 CST 1s left Thu 2016-03-10 18:48:56 CST 1s ago gnome-rotate-wallpaper.timer gnome-rotate-wallpaper.service
1 timers listed.
Pass --all to see loaded but inactive timers, too.
```
## User Configuration
### Change the default wallpaper directory.
1. Create the required directories.
```bash
$ mkdir ~/.config/systemd ~/.config/systemd/user
```
2. Create the configuration file. Replace "username" with applicable value.
```bash
$ nano ~/.config/systemd/user/gnome-rotate-wallpaper.conf
```
WALLPAPER_DIR=/home/username/Pictures/wallpaper
### Set the Interval to When the Wallpaper Changes.
Create the timer file and then change the "OnCalendar" value to the desired interval. Refer to [ArchLinux: systemd/Timers](https://wiki.archlinux.org/index.php/Systemd/Timers#Realtime_timer) for further details.
1. Create the required directories.
```bash
$ mkdir ~/.config/systemd ~/.config/systemd/user
```
2. Create the configuration file.
```bash
$ nano ~/.config/systemd/user/gnome-rotate-wallpaper.timer
```
```
[Unit]
Description=Gnome rotate wallpaper
[Timer]
OnCalendar=*:0/1
Persistent=true
Unit=gnome-rotate-wallpaper.service
[Install]
WantedBy=gnome-rotate-wallpaper.service
```
## Avaliable picture-options
- none
- wallpaper
- centered
- scaled
- stretched
- zoom
- spanned
## External Links
* https://wiki.archlinux.org/index.php/Systemd/User
* https://wiki.archlinux.org/index.php/Systemd/Timers
* https://major.io/2015/02/11/rotate-gnome-3s-wallpaper-systemd-user-units-timers/
* https://stackoverflow.com/questions/10374520/gsettings-with-cron

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# Change the lock screen shield
# External Links
- https://help.gnome.org/admin/system-admin-guide/stable/desktop-shield.html.en

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#!/bin/bash
selection=$(find $WALLPAPER_DIR -type f -name "*.jpg" -o -name "*.png" | shuf -n1)
gsettings set org.gnome.desktop.background picture-uri "file://$selection"
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