Update worpress, plugins and theme using wp-cli from Cron

wp-update.sh

#!/bin/sh
# Simple script to update a WordPress install (core, plugins, themes and languages) using wp-cli.
# Usually we expect to run this from cron.
# Written by Kitson Consulting and released into the public domain.

if [ $# -ne 1 ]
then
    echo "Usage: $0 </path/to/wordpress/install>" >&2
    exit 1
fi
if [ ! -d "$1" ]
then
    echo "$1 does not appear to be a directory. Exiting." >&2
    exit 2
fi
if [ ! -f "$1"/wp-config.php ]
then
    echo "$1/wp-config.php does not exist. Did you specify the path to a WordPress install?" >&2
    exit 3
fi
wp core update --path="$1" --quiet
wp plugin update --all --path="$1" --quiet
wp theme update --all --path="$1" --quiet
wp language core update --path="$1"  --quiet
wp language plugin update --all --path="$1" --quiet
wp language theme update --all --path="$1" --quiet

# Usage
# ./wp-update /path/to/wordpress/site