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Remote Keep asking for passphrase of SSH key

Setting up the SSH Agent

Windows

To enable SSH Agent automatically on Windows, start a local Administrator PowerShell and run the following commands: Make sure you're running as an Administrator

Set-Service ssh-agent -StartupType Automatic
Start-Service ssh-agent
Get-Service ssh-agent

Now the agent will be started automatically on login.

Linux

To start the SSH Agent in the background, run:

eval "$(ssh-agent -s)"

To start the SSH Agent automatically on login, add these lines to your ~/.bash_profile:

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 &> .ssh/ssh-agent
   fi
   eval `cat .ssh/ssh-agent`
fi

Mac

The agent should be running by default on macOS.