Micropython

Installing:

sudo pip install esptool
esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=detect 0 ~/Desktop/esp8266-20171101-v1.9.3.bin

Connecting via Terminal:

sudo apt install picocom
picocom /dev/ttyUSB0 -b115200

Connecting via REPL(web):

import webrepl_setup

Following on-screen instructions. After reboot, it will be available for connection. If you disabled automatic start-up on boot, you may run configured daemon on demand using:

import webrepl
webrepl.start()

Playing with GPIO:

import machine
pin = machine.Pin(2, machine.Pin.OUT)
pin.on()
pin.off()

def toggle(p):
   p.value(not p.value())

toggle(pin)

import time
while True:
   toggle(pin)
   time.sleep_ms(500)

Checking filesystem:

import os
os.listdir()

Checking Machine Frequency & Overclocking:

import machine
machine.freq()                # get the current frequency of the CPU
machine.freq(160000000)       # set the CPU frequency to 160 MHz