Connect my zeb duke wireless bluetooth headphone using terminal in fedora 40

 install bluez-deprecated 

sudo dnf install bluez-deprecated

hcitool scan

should show the bluetooth devices

if not 

bluetoothctl

agent on
scan on # wait for your device's address to show up here
scan off
trust MAC_ADDRESS (in my case 41:42:FF:71:7A:6B)
pair MAC_ADDRRESS(in my case 41:42:FF:71:7A:6B) 

// the above comment will fail  if the device is already paired
connect MAC_ADDRESS (in my case 41:42:FF:71:7A:6B)

there are simpler ways off course

bluetoothctl devices

this will show the device with the mac address

now if the device is not paired 

bluetoothctl pair 41:42:FF:71:7A:6B

if this succeeds then

bluetoothctl connect 41:42:FF:71:7A:6B

to disconnect

bluetoothctl disconnect 41:42:FF:71:7A:6B

 

 to remove the pairing

bluetoothctl remove 41:42:FF:71:7A:6B

Source:https://unix.stackexchange.com/questions/96693/connect-to-a-bluetooth-device-via-terminal

Source:https://unix.stackexchange.com/questions/96693/connect-to-a-bluetooth-device-via-terminal

Source:https://askubuntu.com/questions/758586/how-to-unpair-bluetooth-device-from-the-command-line

Source:https://www.baeldung.com/linux/bluetooth-via-terminal