pwd
Show current time and date: date
Show calendar: cal
Show particular year's calendar: cal 2021
Open Arduino IDE
Link: https://arduino.esp8266.com/stable/package_esp8266com_index.json
Click File > Preferences and copy the link and paste that in the Additional Boards Manager URLs then press OK
Click File > Board > Boards Manager and search for esp8266 and intall the latest Version
File permission and ownership is very important in linux system.
VIM is a terminal based text editor. It is very handy to use. This is the most powerful text editor that by default comes with almost all Unix/Linux system.
Basic guide of VIM editor has given below:
Insert Mode --> Command = (i)
Escape Mode --> Command = (Esc)
File save and quit --> Command = (:x)
First we need to reboot the system.
Secondly from the grub boot loader we need to press e from the keyboard. Here e means edit.
Now go to end of the line number-4 and write rd.break Note: rd = rescue disk
Then press Ctrl+X to load the system