bastion-jump.sh

#!/bin/bash

function ssh_jump_aws {
  if [[ -z $1 ]]; then 
    echo "jump hostname required as parameter 1"
    return 1
  fi

  if [[ -z $2 ]]; then
    echo "target hostname required as parameter 2"
    return 1
  fi

  local jump_host=$1
  local target_host=$2
  ssh -o ProxyCommand="ssh -W %h:%p '$jump_host'" "ec2-user@$target_host"
}

ssh_jump_aws $@

ssh_aws_jumphost.sh

#!/bin/bash

function ssh_jump_aws {
  if [[ -z $1 ]]; then 
    echo "jump hostname required as parameter 1"
    return 1
  fi

  if [[ -z $2 ]]; then
    echo "target hostname required as parameter 2"
    return 1
  fi

  local jump_host=$1
  local target_host=$2
  ssh -o ProxyCommand="ssh -W %h:%p '$jump_host'" "ec2-user@$target_host"
}

ssh_jump_aws $@