Overview

SSH

• ssh-keygen: creates a key pair protected by a passphrase
• • You should add one, even if it makes it take longer
• ssh-copy-id user@host: gives out the public key to that user on that host
• eval 'ssh-agent': enables the ssh-agent
• • check notes if having issues with agent
• ssh-add: adds the private key
• • -t 1h: adds it for only 1 hour

Root Elevation

• edit /etc/sudoers
• remove comment marker from "Same Thing without a password" setting (the line below)

PSSH

• pssh (Options) (Command): parallel ssh (allows to run ssh commands on multiple hosts at once)
• • -h: host file
• • -i: displays standard output and errors
• • -A: prompts the passphrase

Ansible

• ansible all (Options) (Command): Runs as an ansible command
• -i: inventory (list of hosts)
• -b: run as if it were a sudo user
• -a: module arguments

Notes

• To fix issue of not connecting to agent, use exec ssh-agent bash to enable ssh-agent
• Curl command - Enables data transfer to and from a web server

Sources

• Agent Connection Solution
• PSSH Documentation
• Curl Command
• Ansible Documentation