Debian iptables Linux

kernel: conntrack: generic helper won’t handle protocol 47.

I was getting the following message in my log files on my Debian firewall. kernel: conntrack: generic helper won’t handle protocol 47. Please consider loading the specific helper module. The nf_conntrack_proto_gre module needs to be loaded to resolve this. modprobe nf_conntrack_proto_gre To load it automatically at boot, I created a new file (gre.conf) in /etc/modules-load.d […]

Bind9 Debian Linux opendkim Postfix

OpenDKIM on Debian 9.4 (stretch)

I spent a lot of time trying to get OpenDKIM to work on Debian Stretch. Having searched the Internet thoroughly, once again I found many different configurations, none of which actually worked for me. These are my various config files, with the domain name(s) swapped for “example.com” and the ‘selectors’ swapped for “example-selector-name” If you […]

CentOS Debian ESXi Linux VMWare

Graphing disk temperatures with the Eluna Graph System

I have been using the Eluna Graph System for several years, as I like it’s simplicity. As per this post, I graph my ESXi disk temperatures so that I can keep an eye on them. Content of create.sh: #!/bin/bash rrdtool create esxi_disks.rrd \ –start `date +%s` \ –step 300 \ DS:disk1:GAUGE:600:0:U \ DS:disk2:GAUGE:600:0:U \ DS:disk3:GAUGE:600:0:U […]

CentOS Debian Linux

Fix font path for gnuplot

In the console enter: In my gnuplot (bash) scripts I have: export GDFONTPATH=”/usr/share/fonts/truetype/ttf-dejavu/” export GNUPLOT_FONTPATH=”/usr/share/fonts/truetype/ttf-dejavu/” Other methods: export GDFONTPATH=”/your/font/directory/fonts/” before you start gnuplot. The fonts should be in the folder “/fonts”. To make this persistent across reboots, and to set the paths for fonts in postscript terminal, add lines similar to the ones below to […]