A little bit of wisdom
Debian 8.9 (Jessie) The problem I had was a bind9 server that wouldn’t run in a chroot environment, despite being configured to do so in /etc/default/bind9 Running the daemon directly from the command line using named -u bind -4 -t /var/named/chroot worked just fine and the server ran as expected. After a little research I […]
I wanted to enable ulogd for my firewall logging, but after finding several sites with examples, none of them worked for me. So after gathering snippets of info from various sites, I managed to put a working configuration together, which is what you see here. This is on Debian 8.9 (Jessie) Install ulogd (ulogd is […]
My server was running 2x 1TB disks in a mirror, and I needed more space, so I purchased 2x 2TB disks. The following steps demonstrate how I expanded the RAID volume to 2TB without data loss. My RAID array /dev/md1 consisted of two RAID members, /dev/sdc and /dev/sdd. First step was to remove one of […]
UPDATED March 2023 (see below) Getting MPD to work with the ALSA Equaliser plugin I found a few sites with ‘howtos’ for this, although none of them worked for me. First thing to do is ensure your MPD installation is working properly, and playing music through your chosen device. If you have any problems getting […]
Using paste: paste -sd” ” inputfile If you want to comma delimit the file, just add a comma in between the quotes: paste -sd”,” inputfile
Graph plotting with Gnuplot can be quite difficult without some basic knowledge of the syntax. I also find that some settings overwrite others, for an example see this post on Stackoverflow and the same applies in this script below where the second line overwrites the first, despite them supposedly being treated as separate lines. set […]
HP Smart array CLI commands (these should apply to any system with the CLI installed) Show configuration /opt/hp/hpssacli/bin/hpssacli ctrl all show config Controller status /opt/hp/hpssacli/bin/hpssacli ctrl all show status Show detailed controller information for all controllers /opt/hp/hpssacli/bin/hpssacli ctrl all show detail Show detailed controller information for controller in slot 0 /opt/hp/hpssacli/bin/hpssacli ctrl slot=0 show detail […]
fdisk was always so straightforward. However parted requires just that extra bit of hardware knowledge. I had two disks, /dev/sda and /dev/sdb, on which I wanted to create a swap partition on each, and the remainder of the disk was to be part of a RAID volume. UPDATE: 05/05/2020 A quick and easy way to […]
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 […]
ipsets is a fairly recent addition to the netfilter family. It is possible to define networks / addresses and then use them in iptables. ipset –create bogons nethash ipset –add bogons 10.0.0.0/8 ipset –add bogons 192.168.0.0/16 ipset –add bogons 0.0.0.0/8 ipset –add bogons 169.254.0.0/16 ipset –add bogons 172.16.0.0/12 ipset –add bogons 192.0.2.0/24 ipset –add bogons […]
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