Can't pull into linux

[jrock1203]

Describe the bug
Following linux install instructions, getting nowhere during installation. Just getting error.

To Reproduce
Steps to reproduce the behavior:

1. Follow exact instructions to pull the Git into linux
2. Get "sudo: gladius-guardian: command not found" no matter what.
3. Tried compiling the docker, get: "git clone git@github.com:gladiusio/gladius-node.git
   Cloning into 'gladius-node'...
   Permission denied (publickey).
   fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
"