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Installation

Ensure you have an Ubuntu system that satisfies the installation requirements. In short, you should have an Ubuntu 14.04 Trusty or Ubuntu 16.04 Xenial 64-bit server instance, with at least 4GB RAM, 2 CPUs, and 10 GB disk space. You should also have a domain name available and have updated its DNS record to point to the server.

Please subscribe to low-traffic the Zulip announcements Google Group to get announcements about new releases, security issues, etc.

Step 1: Install SSL Certificates

Zulip runs over https only and requires ssl certificates in order to work. It looks for the certificates in /etc/ssl/private/zulip.key and /etc/ssl/certs/zulip.combined-chain.crt. Note that Zulip uses nginx as its webserver and thus expects a chained certificate bundle

If you need an SSL certificate, see our SSL certificate documentation. If you already have an SSL certificate, just install (or symlink) them into place at the above paths, and move on to the next step.

Step 2: Download and install latest release

If you haven't already, download and unpack the latest built server tarball with the following commands:

sudo -i  # If not already root
cd /root
wget https://www.zulip.com/dist/releases/zulip-server-latest.tar.gz
rm -rf /root/zulip && mkdir /root/zulip
tar -xf zulip-server-latest.tar.gz --directory=/root/zulip --strip-components=1

Then, run the Zulip install script:

/root/zulip/scripts/setup/install

This may take a while to run, since it will install a large number of dependencies.

The Zulip install script is designed to be idempotent, so if it fails, you can just rerun it after correcting the issue that caused it to fail. Also note that it automatically logs a transcript to /var/log/zulip/install.log; please include a copy of that file in any bug reports.

Step 3: Configure Zulip

Configure the Zulip server instance by editing /etc/zulip/settings.py and providing values for the mandatory settings, which are all found under the heading ### MANDATORY SETTINGS.

These settings include:

EXTERNAL_HOST: the user-accessible Zulip domain name for your Zulip installation. This will be the domain for which you have DNS A records pointing to this server and for which you configured SSL certificates.
ZULIP_ADMINISTRATOR: the email address of the person or team maintaining this installation and who will get support emails.
AUTHENTICATION_BACKENDS: a list of enabled authentication mechanisms. You'll need to enable at least one authentication mechanism by uncommenting its corresponding line, and then also do any additional configuration required for that backend as documented in the settings.py file. See the section on Authentication for more detail on the available authentication backends and how to configure them.
EMAIL_*, DEFAULT_FROM_EMAIL, and NOREPLY_EMAIL_ADDRESS: Regardless of which authentication backends you enable, you must provide settings for an outgoing SMTP server so Zulip can send emails when needed. We highly recommend testing your configuration using manage.py send_test_email to confirm your outgoing email configuration is working correctly.
ALLOWED_HOSTS: Replace * with the fully qualified DNS name for your Zulip server here.

Step 4: Initialize Zulip database

At this point, you are done doing things as root. To initialize the Zulip database for your production install, run:

su zulip -c /home/zulip/deployments/current/scripts/setup/initialize-database

The initialize-database script will report an error if you did not fill in all the mandatory settings from /etc/zulip/settings.py. It is safe to rerun it after correcting the problem if that happens.

This completes the process of installing Zulip on your server. However, in order to use Zulip, you'll need to create an organization in your Zulip installation.

If you haven't already, verify that your server can send email using ./manage.py send_test_email username@example.com. You'll need working outgoing email to complete the setup process.
Run the organization (realm) creation management command :
```
su zulip # If you weren't already the zulip user
cd /home/zulip/deployments/current
./manage.py generate_realm_creation_link
```
This will print out a secure 1-time use link that allows creation of a new Zulip organization on your server. For most servers, you will only ever do this once, but you can run manage.py generate_realm_creation_link again if you want to host another organization on your Zulip server.
Open the link generated with your web browser. You'll see the create organization page (screenshot here). Enter your email address and click Create organization.
Check your email to find the confirmation email and click the link. You'll be prompted to finish setting up your organization and initial administrator user (screenshot here). Complete this form and log in!

Congratulations! You are logged in as an organization administrator for your new Zulip organization. After getting oriented, we recommend visiting the special "Administration" tab linked to from the upper-right gear menu in the Zulip app to configure important policy settings like how users can join your new organization. By default, your organization will be configured as follows (screenshot here):

restricted_to_domain=True: Only people with emails with the same ending as yours can join.
invite_required=False: An invitation is not required to join the realm.
invite_by_admin_only=False: You don't need to be an admin user to invite other users.

Next, you'll likely want to do one of the following:

Troubleshooting

If you get an error after scripts/setup/install completes, check /var/log/zulip/errors.log for a traceback, and consult the troubleshooting section for advice on how to debug. If that doesn't help, please visit the "installation help" stream in the Zulip developers' chat for realtime help or email zulip-help@googlegroups.com with the traceback and we'll try to help you out!

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