LSSGaming

• Update to latest patches
	○ Ubuntu
		§ sudo apt update
		§ sudo apt dist-upgrade
	○ Fedora
		§ dnf update
• Ubuntu
	○ login with root or sudo user
		§ adduser NAME
		§ if needed change user to sudo group
		§ usermod -aG sudo NAME
• Fedora
	○ Log in with root or sudo user
		§ adduser -m -g users -G wheel NAME
			□ -m = add a home directory
			□ -g assigns the group
			□ -G adds to the sudo group
• Set the hostname and hosts file
	○ hostnamectl set-hostname name-for-server
		§ Change name-for-server to desired name
		§ Use domain name here if desired
	○ nano /etc/hosts
	○ Leave localhost at default
		§ Add a line
		§ 127.0.1.1 name-for-server
			□ Name-for-server is what was set in the hostname
• setup firewall if needed
	○ ufw allow OpenSSH
	○ ufw enable
	○ ufw status	to check the status of the firewall
• Create ssh key if needed on host computer
	○ ssh-keygen -t ed25519 -C "Comment for ssh key"		
		§ "Comment for ssh key" = what you want to show at the end of your ssh key
	○ ssh-keygen -t ed25519 -C "Comment for ssh key"			
		§ to create a ssh key to use with specific servers of programs
• Copy ssh key to the server
	○ ssh-copy-id username@remote_host
	○ ssh-copy-id -i ~/.ssh/<keyname>.pub			
		§ to copy specific public key to server
	○ ssh -i .ssh/<key_name> <IP Address>			
		§ to use specific key to log into a server
• eval $(ssh-agent)
• ssh-add
• = caching the passphrase with ssh agent
• alias ssha='eval $(ssh-agent) && ssh-add'	to create an alias to put in .bashrc
• disable root login and password log in (make sure you can connect with ssh key before doing this)
• sudo nano /etc/ssh/sshd_config
• change PasswordAuthentication yes to PasswordAuthentication no
• chage allowrootlogin yes - allowrootlogin no
• sudo systemctl restart sshd
• If you’re using the root account to set up keys for a user account
•  it’s also important that the ~/.ssh directory belongs to the user and not to root: chown -R sammy:sammy ~/.ssh