Use KDE Connect for sharing files or text to a device, ringing it, unlocking it, and much more. More information: https://kdeconnect.kde.org.
kdeconnect-cli --list-devices
kdeconnect-cli --list-available
kdeconnect-cli --pair --device {{device_id}}
kdeconnect-cli --ring --name "{{device_name}}"
kdeconnect-cli --share {{url|path/to/file}} --device {{device_id}}
kdeconnect-cli --name "{{device_name}}" --send-sms "{{message}}" --destination {{phone_number}} --attachment {{path/to/file}}
kdeconnect-cli --name "{{device_name}}" --unlock
kdeconnect-cli --name "{{device_name}}" --send-keys {{key}}