Update all your vagrant base boxes

vagrant-box-update-all.sh

#!/bin/bash

# Find all boxes which have updates
AVAILABLE_UPDATES=`vagrant box outdated --global | grep outdated | tr -d "*'" | cut -d ' ' -f 2`

if [ ! ${#AVAILABLE_UPDATES[@]} -eq 0 ]; then
  for box in $AVAILABLE_UPDATES ; do

    echo "Found an update for $box"

    # Find all current versions
    VERSIONS=`vagrant box list | grep $box | cut -d ',' -f 2 | tr -d ' )'`

    # Add latest version
    vagrant box add --clean $box
    BOX_UPDATED="TRUE"

    # Remove all old versions
    for version in $VERSIONS ; do
      vagrant box remove $box -f --box-version=$version
    done

  done

  echo "All boxes are now up to date!"

else

  echo "All boxes are already up to date!"

fi

vagrant box outdated --global

You probably want to redirect errors since vagrant gets upset when it can't find a box on Atlas anyone.

vagrant box outdated --global 2>/dev/null

Also this blows up if the box has multiple providers, which most do now. It just hands waiting for the user to specify what provider they want

Updated version based on what @thom8 did to account for all providers

https://gist.github.com/sc250024/05a5aa1a1ee2db02080f8714226986e9