Step 1: Change directory into your path that installed the ghost blog. For example, mine is:

cd /var/www

Step 2: Download the latest verion using wget

_wget _https://ghost.org/zip/ghost-X.X.X.zip

Note: You could find the current verion in the official website: https://ghost.org/download/

Step 3: Remove the old core code

rm -rf ghost/core

Step 4: Unzip the downloaded file

unzip -uo ghost-0.6.4.zip -d ghost

Step 5: Change ownership and permission

*chown -R ghost:ghost ghost/**

Step 6: Install new dependencies

cd /var/www/ghost

npm install

Step 7: Restart ghost

pm2 restart ghost

Note: If you are not using pm2, you may run the below command instead:

service ghost start