This is the result:
root@7a424e7:~# systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Drop-In: /etc/systemd/system/bluetooth.service.d
└─bluetooth.conf
Active: inactive (dead)
Docs: man:bluetoothd(8)
After obtain the output, i type:
systemctl restart bluetooth
systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Drop-In: /etc/systemd/system/bluetooth.service.d
└─bluetooth.conf
Active: active (running) since Sun 2020-04-12 17:46:39 UTC; 6s ago
Docs: man:bluetoothd(8)
Main PID: 2643 (bluetoothd)
Status: “Running”
Tasks: 1 (limit: 2305)
Memory: 1.1M
CGroup: /system.slice/bluetooth.service
└─2643 /usr/libexec/bluetooth/bluetoothd --experimental
But i still not find in scan by phone.