rtl-sdr steps

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Installing and configurating steps:

$ git clone https://github.com/balint256/gr-baz
$ sudo apt-get install libboost-all-dev gr-osmosdr gnuradio-dev liblog4cpp5-dev 
$ cd gr-baz
$ mkdir build
$ cd build
$ cmake ..
$ make && sudo make install

Install rtl-sdr:

$ git clone git://git.osmocom.org/rtl-sdr.git 
$ cd rtl-sdr 
$ mkdir build
$ cd build/
$ cmake ../ -DINSTALL_UDEV_RULES=ON
$ sudo make install
$ sudo ldconfig 

Now you could use sudo rtl_eeprom for probing the rtl equipments.

$ sudo modprobe -r dvb_usb_rtl28xxu
$ sudo apt-get install -y gqrx-sdr

Using gqrx could scan the frequency and get the radio stations.