delwar2016 · October 9, 2017 10:55
diff --git a/install SSL certificate b/install SSL certificate
 https://certbot.eff.org/#ubuntutrusty-nginx

 https://askubuntu.com/questions/363200/e-unable-to-correct-problems-you-have-held-broken-packages


 Use aptitude instead of apt-get. It is more intelligent. It not only will handle downgrading conflicting packages for you, but will make a series of recommendations asking you which of many possible suggested working scenarios you would like.

 sudo aptitude install myNewPackage
 If you don't have aptitude on your machine yet, get it with

 sudo apt-get install aptitude

 https://stackoverflow.com/questions/34733340/mongodb-gpg-invalid-signatures
	https://certbot.eff.org/#ubuntutrusty-nginx

	https://askubuntu.com/questions/363200/e-unable-to-correct-problems-you-have-held-broken-packages


	Use aptitude instead of apt-get. It is more intelligent. It not only will handle downgrading conflicting packages for you, but will make a series of recommendations asking you which of many possible suggested working scenarios you would like.

	sudo aptitude install myNewPackage
	If you don't have aptitude on your machine yet, get it with

	sudo apt-get install aptitude

	https://stackoverflow.com/questions/34733340/mongodb-gpg-invalid-signatures