ssh config Link to heading

Host vps
    HostName 123.45.678.9
    User root
    IdentityFile ~/.ssh/id_vps # 
    AddKeysToAgent yes  # automatically adds the key to the running agent
    UseKeychain yes # stores the passphrase in the macOS Keychain
    ServerAliveInterval 60 # send keep-alive signal every 60 s (disabled by default)

Show the settings for a host

ssh -G vps

ssh-keygen Link to heading

Generating new key pair Link to heading

# ed25519 more secure elliptic curve
# -C: allows to give a comment to identify key
ssh-keygen -t ed25519  -C "<comment>"

Removing known host entries Link to heading

ssh-keygen -f ~/.ssh/known_hosts -R 123.45.678.9

Copy public key to server Link to heading

ssh-copy-id -i <public key> <user>@<ip_address>
# e.g. ssh-copy-id -i ~/.ssh/id_vps.pub user@123.45.678.9

Checking the passphrase for a private key Link to heading

ssh-keygen -y -f /path/to/your/private_key

ssh agent Link to heading

# load key in agent
ssh-add /path/to/your/private_key

# check keys loaded in the agent
ssh-add -l

scp Link to heading

scp username@source:/location/to/file username@destination:/where/to/put