Добавление ключа в keyring с проверкой необходимости

KEYFILE=~/.ssh/your-key
 
getfingerprint()
{
    FINGERPRINT=$(echo "$KEYFILE" | ssh-keygen -l 2>/dev/null | awk '{print $2}')
}
 
preparekeys()
{
    getfingerprint
 
    if ssh-add -l | grep -q $FINGERPRINT; then
        echo "$KEYFILE ($FINGERPRINT) already in keyring"
    else
        ssh-add $KEYFILE
    fi
}