What is A10-OLinuXino-LIME ?

[DNNikolov]

I've read the product page (https://www.olimex.com/Products/OLinuXino/open-source-hardware) about OLinuXino and the wiki page (https://www.olimex.com/wiki/A10-OLinuXino-LIME) and from what I understand it is a one board computer on which could be installed Debian linux from a bootable SD card. Does that means that I can connect a 17 inch display and a keyboard and start typing commands on a terminal or use a graphic inteface ? How can I interact with OLinuxIno? How can I make OLinuXino switch relays and light diods after installing linux? By writing C code and put it where ?

[MBR]

Does that means that I can connect a 17 inch display and a keyboard and start typing commands on a terminal or use a graphic inteface ?

Yes, if the display has a HDMI input (or DVI, with DVI-HDMI adapter/cable) and the keyboard has USB connector, you can use it as a normal computer. You can even log in remotely via SSH, if you connect the enthernet cable.

How can I interact with OLinuxIno? How can I make OLinuXino switch relays and light diods after installing linux? By writing C code and put it where ?

Yes, the LED may be driven directly by the GPIO pins (you have to add a current-limiting resitor only) but for relays, you will probably need an external IO module (see https://www.olimex.com/Products/Modules/IO/). You don't even have to wtite a prgoram, you can control the GPIO pins from the shell prompty, by writing to the corresponding files in the /sys directories.