A basic sh script to update Ghost blog.
This script is written for use in FreeBSD 10.x, and MAY be good for other BSDs and Mac OS X as well. It can also be used for other Unix-like system(such as Linux) with proper modification.
This script assumes:
1. You use system service(rc) to manage your ghost server, and have stop and start as rc commands for halting and launching ghost server. If you don’t know how to do so, read section 5 of this article.
2. Your ghost software is installed in /var/www/ghost
Otherwise, some modifications may be needed before run this script.
Not suitable for version jump update.
# Copyright (c) 2016 Mo Zhang
# Licensed under the MIT License.
#! /bin/sh
service ghost stop
cd /var/www
cp -R ghost ghost_backup
rm ghost-latest.zip
curl -LOk https://ghost.org/zip/ghost-latest.zip
unzip ghost-latest.zip -d ghost_new
cd ghost
rm -R core
rm index.js
rm *.md
rm *.json
cp -R ../ghost_new/core .
cp ../ghost_new/index.js .
cp ../ghost_new/*.json .
cp ../ghost_new/*.md .
cp -R ../ghost_new/content/themes/casper ./content/themes
cd ..
chown -R ghost:ghost *
cd ghost
npm install --production
service ghost start 
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