Make sure you have enabled the camera by
sudo raspi-config(If you don't know how to do this take a look at Log 2.)
raspistill -o cam.jpg # take a picture with the raspberry picam raspivid -o video.h264 -t 10000 #record a video (for 10s) with picamUse
ls -lcommand to verify "cam.jpg" and "video.h256" are there.
pcmanfm &command to open the documents folder of the raspberry pi
there should be the picture you've just took (named as cam.jpg) double click on that to open the picture
also the video (named as video.h264) that you've recorded is located in the same directory.