doc: Add a "Deployment with rsync" tutorial page

This is kind of a generic process and not so difficult. It seems important to me that it should be documented.

1 files changed, 125 insertions, 0 deletions

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+---
+authors:
+- Adrien Poupin
+date: 2016-11-01
+linktitle: Deployment with rsync
+toc: true
+menu:
+  main:
+    parent: tutorials
+next: /tutorials/creating-a-new-theme
+prev: /tutorials/automated-deployments
+title: Easy deployments with rsync
+weight: 11
+
+---
+
+# How to build and deploy with hugo and rsync
+We assume here that you have an access to your web host with SSH. In that case, as you will see, deployment is very simple. We also assume that you have a functional static site with hugo installed. 
+
+The spoil is, you can deploy your entire site with a command that looks like this:
+
+```bash
+hugo && rsync -avz --delete public/ www-data@ftp.topologix.fr:~/www/
+```
+
+As you will see, we put it in a shell script file, which makes building and deployment as easy as executing `./deploy`.
+
+## Installing SSH Key
+
+If it is not done yet, we will make an automated way to SSH to your server. If you have already installed an SSH key, switch to the next section.
+
+First, install the ssh client. On Debian/Ubuntu/derivates, enter `sudo apt-get install openssh-client`.
+
+Then generate your ssh key by entering the following commands:
+```
+~$ cd && mkdir .ssh & cd .ssh
+~/.ssh/$ ssh-keygen -t rsa -q -C "For SSH" -f rsa_id
+~/.ssh/$ cat >> config <<EOF
+Host HOST
+     Hostname HOST
+     Port 22
+     User USER
+     IdentityFile ~/.ssh/rsa_id
+EOF
+```
+Don't forget to replace the `HOST` and `USER` values with your own ones. Then copy your ssh public key to the remote server:
+
+```
+~/.ssh/$ ssh-copy-id -i rsa_id.pub USER@HOST.com
+```
+
+Now you can easily connect to the remote server:
+
+```
+~$ ssh user@host
+Enter passphrase for key '/home/mylogin/.ssh/rsa_id':
+```
+
+And you've done it!
+
+## Shell script
+
+We will put the first command in a script at the root of your hugo tree:
+
+```
+~/websites/topologix.fr$ editor deploy
+```
+Here you put the following content. Replace the `USER`, `HOST` and `DIR` values with your own.
+
+```
+#!/bin/sh
+USER=my-user
+HOST=my-server.com
+DIR=my/directory/to/topologix.fr/   # might sometimes be empty!
+
+hugo && rsync -avz --delete public/ ${USER}@${HOST}:~/${DIR}
+
+exit 0
+```
+
+Note that `DIR` is the relative path from the remote user's home. If you have to specify a full path (for instance `/var/www/mysite/`) you must change `~/${DIR}` to `${DIR}` inside the command line. For most cases you should not have to.
+
+Save and close, and make the `deploy` file executable:
+
+```
+~/websites/topologix.fr$ chmod +x deploy
+```
+
+Now you only have to enter the following command to deploy and update your website:
+
+```
+~/websites/topologix.fr$ ./deploy
+Started building sites ...
+Built site for language en:
+0 draft content
+0 future content
+0 expired content
+5 pages created
+0 non-page files copied
+0 paginator pages created
+0 tags created
+0 categories created
+total in 56 ms
+sending incremental file list
+404.html
+index.html
+index.xml
+sitemap.xml
+cours-versailles/index.html
+exercices/index.html
+exercices/index.xml
+exercices/barycentre-et-carres-des-distances/index.html
+post/
+post/index.html
+sujets/index.html
+sujets/index.xml
+sujets/2016-09_supelec-jp/index.html
+tarifs-contact/index.html
+
+sent 9,550 bytes  received 1,708 bytes  7,505.33 bytes/sec
+total size is 966,557  speedup is 85.86
+```
+
+And it's done!
+