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	docs: Clean up headings on new existing server instructions.
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		@@ -16,7 +16,7 @@ These instructions are only for experts.  If you're not an experiecned
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Linux sysadmin, you will have a much better experience if you get a
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					Linux sysadmin, you will have a much better experience if you get a
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dedicated VM to install Zulip on instead (or [use zulipchat.com](https://zulipchat.com).
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					dedicated VM to install Zulip on instead (or [use zulipchat.com](https://zulipchat.com).
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## Nginx
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					### Nginx
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Copy your existing nginx configuration to a backup and then merge the
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					Copy your existing nginx configuration to a backup and then merge the
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one created by Zulip into it:
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					one created by Zulip into it:
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@@ -40,20 +40,7 @@ Zulip's puppet configuration will change the ownership of
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`/var/log/nginx` so that the `zulip` user can access it.  Depending on
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					`/var/log/nginx` so that the `zulip` user can access it.  Depending on
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your configuration, this may or may not cause problems.
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					your configuration, this may or may not cause problems.
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## Upstart
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					### Puppet
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The latest releases of Ubuntu (later than 16.04 Xenial) have
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deprecated `upstart` in favor of `systemd`.  Unfortunately,
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Ubuntu 16.04 often still has `upstart` installed, which can cause
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various services like `nginx` to not start properly (because they
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auto-detect that `upstart` is present, and try to use that, rather
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than `systemd`).  you can remove it as follows:
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```shell
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$ sudo apt remove upstart
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```
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## Puppet
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If you have a puppet server running on your server, you will get an
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					If you have a puppet server running on your server, you will get an
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error message about not being able to connect to the client during the
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					error message about not being able to connect to the client during the
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@@ -70,20 +57,20 @@ $ sudo service puppet-agent stop
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$ sudo service puppet stop
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					$ sudo service puppet stop
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```
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					```
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## Postgres
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					### Postgres
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If you have an existing postgres database, note that Zulip will use
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					If you have an existing postgres database, note that Zulip will use
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the default `main` as its database name; make sure you're not using
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					the default `main` as its database name; make sure you're not using
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that.
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					that.
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## Memcached, redis, and rabbitmq
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					### Memcached, redis, and rabbitmq
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Zulip will, by default, configure these services for its use.  The
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					Zulip will, by default, configure these services for its use.  The
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configuration we use is pretty basic, but if you're using them for
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					configuration we use is pretty basic, but if you're using them for
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something else, you'll want to make sure the configurations are
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					something else, you'll want to make sure the configurations are
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compatible.
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					compatible.
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## No uninstall process
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					### No uninstall process
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We don't provide a convenient way to uninstall a Zulip server.
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					We don't provide a convenient way to uninstall a Zulip server.
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