Then you need to generate the config file (maybe even add a cron to schedule this in and reload smokeping). We've assumed a few locations for smokeping, the config file you want
This is quite simple, just point your dir at the smokeping data directory - please be aware that all RRD files need to be within this dir and NOT sub dirs:
> This guide assumes you have already <a href="http://docs.librenms.org/Installation/Installing-LibreNMS/">installed librenms</a>, and you installed apache2 in the process. Tested with Ubuntu 14.04 and Apache 2.4.
Nearly everything we do will require root, and at one point we'll encounter a problem if we just use sudo, so we'll just switch to root at the beginning...
```bash
sudo su -
```
### Install Smokeping ###
```bash
apt-get install smokeping
```
At the end of installation, you may have gotten this error: `ERROR: /etc/smokeping/config.d/pathnames, line 1: File '/usr/sbin/sendmail' does not exist`
If so, just edit smokeping's pathnames.
```bash
nano /etc/smokeping/config.d/pathnames
```
Comment out the first line:
```bash
#sendmail = /usr/sbin/sendmail
```
Exit and save.
Check if the smokeping config file was created for apache2:
```bash
ls /etc/apache2/conf-available/
```
If you don't see `smokeping.conf` listed, you'll need to create a symlink for it:
If you are using the standard smokeping data dir (/opt/smokeping/data) then you may need to alter the rrdcached config slightly.
In the standard configuration the -B argument may have been used to restrict rrdcached to read only from a single base dir.
If this is true, when you try an open one of the smokeping graphs from within LibreNMS you will see something like this error at the end of the rrdcached command:
So you will need to either change the dir in which smokeping saves its rrd files to be the same as the main librenms dir or you can remove the -B argument from the rrdcached config to allow it to read from more than one dir.
