source: Installation/Installation-Ubuntu-1404-Lighttpd.md
> NOTE: These instructions assume you are the **root** user.  If you are not, prepend `sudo` to the shell commands (the ones that aren't at `mysql>` prompts) or temporarily become a user with root privileges with `sudo -s` or `sudo -i`.

**Please note the minimum supported PHP version is 5.6.4**

### On the DB Server ###

This host is where the MySQL database runs.  It could be the same machine as your network management server (this is the most common initial deployment scenario).

> ** Whilst we are working on ensuring LibreNMS is compatible with MySQL strict mode, for now, please disable this after mysql is installed.

You are free to choose between using MySQL or MariaDB:

**MySQL**
```bash
apt-get install mysql-server mysql-client
mysql -uroot -p
```

**MariaDB**
```bash
apt-get install mariadb-server mariadb-client
mysql -uroot -p
```

Enter the MySQL root password to enter the MySQL command-line interface.

Create database.

```sql
CREATE DATABASE librenms CHARACTER SET utf8 COLLATE utf8_unicode_ci;
CREATE USER 'librenms'@'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON librenms.* TO 'librenms'@'localhost';
FLUSH PRIVILEGES;
exit
```

Replace `<ip>` above with the IP of the server running LibreNMS.  If your database is on the same server as LibreNMS, you can just use `localhost` as the IP address.

If you are deploying a separate database server, you need to change the `bind-address`.  If your MySQL database resides on the same server as LibreNMS, you should skip this step.

    vim /etc/mysql/my.cnf

Within the [mysqld] section please add:

    innodb_file_per_table=1

Find the line: `bind-address = 127.0.0.1`

Change `127.0.0.1` to the IP address that your MySQL server should listen on.  Restart MySQL:

If you see a line that starts `sql-mode` then change this to `sql-mode=""`.

    service mysql restart

### On the NMS ###

Install necessary software.  The packages listed below are an all-inclusive list of packages that were necessary on a clean install of Debian 7.

    apt-get install lighttpd php5-cli php5-mysql php5-gd php5-snmp php5-cgi php-pear php5-curl snmp graphviz rrdtool sendmail fping imagemagick whois mtr-tiny nmap ipmitool php5-mcrypt php5-json python-mysqldb snmpd php-net-ipv4 php-net-ipv6 rrdtool git

### Adding the librenms-user ###

    useradd librenms -d /var/www/librenms -M -r
    usermod -a -G librenms www-data

### Cloning ###

You can clone the repository via HTTPS or SSH.  In either case, you need to ensure the appropriate port (443 for HTTPS, 22 for SSH) is open in the outbound direction for your server.

    cd /opt
    git clone https://github.com/librenms/librenms.git librenms
    cd /var/www/librenms

At this stage you can either launch the web installer by going to http://IP/install.php, follow the onscreen instructions then skip to the 'Web Interface' section further down. Alternatively if you want to continue the setup manually then just keep following these instructions.

    cp config.php.default config.php
    vim config.php

> NOTE: The recommended method of cloning a git repository is HTTPS.  If you would like to clone via SSH instead, use the command `git clone git@github.com:librenms/librenms.git librenms` instead.

Change the values to the right of the equal sign for lines beginning with `$config[db_]` to match your database information as setup above.

Change the value of `$config['snmp']['community']` from `public` to whatever your read-only SNMP community is.  If you have multiple communities, set it to the most common.

** Be sure you have no characters (including whitespace like: newlines, spaces, tabs, etc) outside of the `<?php?>` blocks. Your graphs will break otherwise. **

### Initialise the database ###

Initiate the follow database with the following command:

    php build-base.php

### Create admin user ###

Create the admin user - priv should be 10

    php adduser.php <name> <pass> 10 <email>

Substitute your desired username, password and email address--and leave the angled brackets off.

### Web Interface ###

To prepare the web interface (and adding devices shortly), you'll need to set up Lighttpd.

First, create and chown the `rrd` directory and create the `logs` directory

    mkdir rrd logs
    chown -R librenms:librenms /var/www/librenms
    chmod 775 rrd

> NOTE: If you're planing on running rrdcached, make sure that the path is also chmod'ed to 775 and chown'ed to librenms:librenms.

Next, add the following to `/etc/lighttpd/librenms.conf`

     server.document-root = "/var/www/librenms/html"
     url.rewrite-once = (
       "^/(.*)\.(gif|jpg|jpeg|tiff|svg|png|css|php)$" => "/$0",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/" => "/?page=$1&$2&$3&$4&$5&$6&$7&$8&$9&$10",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/" => "/?page=$1&$2&$3&$4&$5&$6&$7&$8&$9",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/" => "/?page=$1&$2&$3&$4&$5&$6&$7&$8",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/" => "/?page=$1&$2&$3&$4&$5&$6&$7",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/(.+)/(.+)/(.+)/(.+)/" => "/?page=$1&$2&$3&$4&$5&$6",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/(.+)/(.+)/" => "/?page=$1&$2&$3&$4&$5",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/(.+)/" => "/?page=$1&$2&$3&$4",
       "^/([a-z|0-9\-]+)/(.+)/(.+)/" => "/?page=$1&$2&$3",
       "^/([a-z|0-9\-]+)/(.+)/" => "/?page=$1&$2",
       "^/([a-z|0-9\-]+)/$" => "/?page=$1"
     )

Next, add the following to `/etc/lighttpd/lighttpd.conf`

     $HTTP["host"] == "example.com" { include "librenms.conf" }

And enable mod_rewrite by uncommenting
     #       "mod_rewrite",
to
             "mod_rewrite",

Don't forget to change 'example.com' to your domain

Enable fastcgi in Lighttpd by running the following commands,

     lighty-enable-mod fastcgi
     lighty-enable-mod fastcgi-php

And add the following to /etc/php5/cgi/php.ini

     cgi.fix_pathinfo = 1

then restart Lighttpd:

    service lighttpd restart

### Validate your install ###

Run validate.php as root in the librenms directory

    php validate.php

This will check your install to verify it is set up correctly.

### Add localhost ###

    php addhost.php localhost public v2c

This assumes you haven't made community changes--if you have, replace `public` with your community.  It also assumes SNMP v2c.  If you're using v3, there are additional steps (NOTE: instructions for SNMPv3 to come).

Discover localhost:

    php discovery.php -h all

### Create cronjob ###

The polling method used by LibreNMS is `poller-wrapper.py`, which was placed in the public domain by its author.  By default, the LibreNMS cronjob runs `poller-wrapper.py` with 16 threads.  The current LibreNMS recommendation is to use 4 threads per core.  The default if no thread count is `16 threads`.

If the thread count needs to be changed, you can do so by editing the cron file (`/etc/cron.d/librenms`).
 Just add a number after `poller-wrapper.py`, as in the below example:

    /var/www/librenms/poller-wrapper.py 12 >> /dev/null 2>&1

Create the cronjob

    cp librenms.nonroot.cron /etc/cron.d/librenms

### Copy logrotate config ###

LibreNMS keeps logs in `/var/www/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:

    cp misc/librenms.logrotate /etc/logrotate.d/librenms

### Daily Updates ###

LibreNMS performs daily updates by default.  At 00:15 system time every day, a `git pull --no-edit --quiet` is performed.  You can override this default by editing your `config.php` file.  Remove the comment (the `#` mark) on the line:

    #$config['update'] = 0;

so that it looks like this:

    $config['update'] = 0;

### Install complete ###

Please allow for 2-3 runs of the poller-wrapper for data to start appearing in the WebUI.
If you don't see data after this, please refer to the [FAQ](http://docs.librenms.org/Support/FAQ/) for assistance.

That's it!  You now should be able to log in to http://librenms.example.com/.  Please note that we have not covered HTTPS setup in this example, so your LibreNMS install is not secure by default.  Please do not expose it to the public Internet unless you have configured HTTPS and taken appropriate web server hardening steps.

It would be great if you would consider opting into the stats system we have, please see [this page](http://docs.librenms.org/General/Callback-Stats-and-Privacy/) on what it is and how to enable it.
