I am using HP-Laptop-15-bs1xx my bluetooth is not working.So how to check whether my lap has bluetooth or not.if i have how to install it.
lshw tool is among the best tools to check the hardware that can be seen under Linux on a specific system. It's highly recommended to use it with high privileges.
I'd suggest you to start with
sudo lshw -businfo to get a first taste.
Then you can dive deeper with just
sudo lshw (be warned: the output can be quite long to be read).
Then you can use a number of other tools like
lsusb for USB related hardware,
lspci for information about PCI-attached hardware and
lsscsi for storage devices using the SCSI layer (almost all of them do). Man pages are available to tune the amount of details you want to get.
If you can dual-boot with another OS that can successfully use that hardware, please go on and take note about that hardware by inspecting the hardware details with that OS.
In any case, if your device isn't listed at all, that is likely meaning that it isn't supported by Linux or, at least, by the Ubuntu kernel you are using. Maybe an upgrade can help.