how to be a masternode pls ?
is there a guide to do it ?
You must watch the output of every linux command closely. There are some little typo mistakes, like this:
sudo apt-get install libdb4.8-dev libdb4.8++-dev -y
must be:
sudo apt -y install libdb4.8-dev
sudo apt -y install libdb4.8++-dev
Then it is FINE.