During Oracle cloud setup. I created one instance with Ubuntu as os. I wanted to install apache2 in my system. But when i tried to run the following command. 

sudo apt install apache2

i got error no package found. So i searched on google for resolving this issue. After searching a lot, i found one command to install all package in system this command is 

sudo apt-get update

this command will store packages in your system and you can now run sudo apt install apache2 command successfully.

In next post, i will tell you how get oracle cloud vm instance on remote through SSH