curl: (35) SSL connect error

PROBLEM

Ok, I am trying to install DigitalOcean Agent on my Centos 6.6 box as their instruction

curl -sSL https://agent.digitalocean.com/install.sh | sh

And immediately get the error

curl: (35) SSL connect error

SOLUTION

We need to update the nss package

yum update nss

And then it worked flawlessly !