請先切換目錄:#
cd /lib/systemd/system
接著直接添加以下兩個檔案：#
第一個：
sudo vim update-system-flatpaks.timer
[Unit]
Description=Update system Flatpaks daily
Documentation=man:flatpak-update(1)
[Timer]
OnCalendar=daily
Persistent=true
[Install]
WantedBy=timers.target
第二個：
sudo vim update-system-flatpaks.service
[Unit]
Description=Update system Flatpaks
Documentation=man:flatpak-update(1)
After=network-online.target
Wants=network-online.target
[Service]
Type=oneshot
ExecStart=/usr/bin/flatpak --system update -y --noninteractive
[Install]
WantedBy=default.target
最後開啟定時器：
sudo systemctl enable update-system-flatpaks.timer
另一種選擇#
取自 Universal Blue Project: https://github.com/ublue-os/config/tree/main/files/usr/lib/systemd
與 OpenSUSE MicroOS 的不同之處是它所做的事情是更完整的，除了多了 uninstall --unused -y 會移除沒有用的依賴，還會檢查是否為計量連線，另外，同時也包含了 User 與 System 兩種 Flatpak。
請先切換目錄:#
cd /lib/systemd/system
System 第一個：
sudo vim flatpak-system-update.service
[Unit]
Description=Flatpak Automatic Update
Documentation=man:flatpak(1)
Wants=network-online.target
After=network-online.target
[Service]
Type=oneshot
ExecCondition=/bin/bash -c '[[ "$(busctl get-property org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager Metered | cut -c 3-)" == @(2|4) ]]'
ExecStart=/usr/bin/flatpak --system uninstall --unused -y --noninteractive ; /usr/bin/flatpak --system update -y --noninteractive ; /usr/bin/flatpak --system repair
System 第二個：
sudo vim flatpak-system-update.timer
[Unit]
Description=Flatpak Automatic Update Trigger
Documentation=man:flatpak(1)
[Timer]
RandomizedDelaySec=10m
OnBootSec=2m
OnCalendar=*-*-* 4:00:00
Persistent=true
[Install]
WantedBy=timers.target
開啟 System Flatpak 定時器：
sudo systemctl enable flatpak-system-update.timer
接下來 User Flatpak#
請切換目錄: (目錄不一樣記得切)#
cd /lib/systemd/user
User 第一個：
sudo vim flatpak-user-update.service
[Unit]
Description=Flatpak Automatic Update
Documentation=man:flatpak(1)
Wants=network-online.target
After=network-online.target
[Service]
Type=oneshot
ExecCondition=/bin/bash -c '[[ "$(busctl get-property org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager Metered | cut -c 3-)" == @(2|4) ]]'
ExecStart=/usr/bin/flatpak --user uninstall --unused -y --noninteractive ; /usr/bin/flatpak --user update -y --noninteractive ; /usr/bin/flatpak --user repair
User 第二個：
sudo vim flatpak-user-update.timer
[Unit]
Description=Flatpak Automatic Update Trigger
Documentation=man:flatpak(1)
[Timer]
RandomizedDelaySec=10m
OnBootSec=2m
OnCalendar=*-*-* 4:00:00
Persistent=true
[Install]
WantedBy=timers.target
開啟 User Flatpak 定時器： (這裡不要 sudo 而且要多加 --user 喔！)
systemctl --user enable flatpak-user-update.timer