Skip to content

How to use OpenSSH

Installation

Install and configure OpenSSH with the following commands.

Install OpenSSH.

In a terminal, execute the following command(s).
1
sudo apt install openssh-server

Start the SSH agent and add it your shell so it starts on login

~/.bash_profile (for Bash) or ~/.zprofile (for ZSH)
1
2
3
4
5
6
7
8
9
if [ -z "$SSH_AUTH_SOCK" ]; then
	# Check for a currently running instance of the agent
	RUNNING_AGENT="`ps -ax | grep 'ssh-agent -s' | grep -v grep | wc -l | tr -d '[:space:]'`"
	if [ "$RUNNING_AGENT" = "0" ]; then
				# Launch a new instance of the agent
				ssh-agent -s &> $HOME/.ssh/ssh-agent
	fi
	eval `cat $HOME/.ssh/ssh-agent`
fi

Install OpenSSH.

In a terminal, execute the following command(s).
1
brew install openssh

Install OpenSSH.

In a terminal, execute the following command(s).
1
TODO

Start a local Administrator PowerShell and start the SSH agent.

In a terminal, execute the following command(s).
1
2
3
Set-Service ssh-agent -StartupType Automatic
Start-Service ssh-agent
Get-Service ssh-agent

Common tasks

Create a SSH keypair

Replace <filename> with the name of the file. Leave empty for default name.

In a terminal, execute the following command(s).
1
2
3
4
5
6
7
# Generate the public/private keys pair
ssh-keygen \
  -t ed25519 \
  -f ~/.ssh/<filename> \
  -q \
  -N "" \
  -C ""

Add the SSH key to the local SSH agent

Replace <filename> with the name of the file.

In a terminal, execute the following command(s).
1
2
# Add the SSH key to the agent
ssh-add ~/.ssh/<filename>

Transfer the public SSH key to a remote host

Replace <filename> with the name of the file, <username> with the username and <host> with the name/IP of the host.

In a terminal, execute the following command(s).
1
2
# Transfer the SSH public key to the remote host
ssh-copy-id [-i ~/.ssh/<filename>.pub] <username>@<host>

Connect to a remote host

Replace <filename> with the name of the file, <username> with the username and <host> with the name/IP of the host.

In a terminal, execute the following command(s).
1
2
# Connect to the Raspberry Pi without a password
ssh [-i ~/.ssh/<filename>] <username>@<host>

These explanations are related to the current item (in alphabetical order).

Resources and alternatives

These resources and alternatives are related to the current item (in alphabetical order).

None at the moment.