For the Linux Arduino IDE – ESP8266 toolchain, there is an example (I haven’t tried this one) at “Programming ESP8266-EVB with Arduino IDE” by Olimex Ltd “https: ...

A lot of people have used ESP8266 to add inexpensive WiFi connectivity to their projects, but [Oscar] decided to take it one step further and program an Arduino over WiFi with the ESP8266. [Oscar] … ...