There are three things you can try.
Option 1: enable SSH
Plug SD card into reader and into your laptop. You will see the
/boot partition. Create an empty file SSH here without file extension. This will enable SSH on boot. With some luck, you can already ssh into your raspi with default password
Option 2: turn your rapsi to Ethernet Gadget and connect via USB cable
- plug SD card into reader and reader into your computer
- edit in boot partition the following with a text editor:
config.txt --> Go to the bottom and add
dtoverlay=dwc2 as the last line
cmdline.txt --> After rootwait (the last word on the first line) add a space and then
modules-load=dwc2,g_ether be careful with spaces etc.
2.3. with new Jessie you will need to create in /boot and empty file with the name
SSH (no file extension!), this switches SSH by default on
if you are on a mac (OSX) you are fine, with Windows you probably need to install Bonjour zeroconf service (go to https://support.apple.com and search for bonjour download)
plug the usb cable into the USB jack marked "USB" (not "Power In") and plug it into your computer
- Here you should be able to ping raspberrypi.local
- if this works you can connect to your raspi with
firstname.lastname@example.org initial password is
- from here you can setup your raspi for Wifi etc.
Option 3: Connect via console cable
Get a console cable, connect it to the raspi, if you are on a Windows machine connect to it with Putty. You have to install a driver first. I bought a cheap USB zu TTL-Converter which kind of works most of the time but is very buggy. Try to get the cable from adafruit ~9USD, I believe it's working fine. Search for tutorials on how to use this on their site.
USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi