clintel

Fenced code blocks inside ordered and unordered lists

1. This is a numbered list.

2. I'm going to include a fenced code block as part of this bullet:

   Code
   More Code
   

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

kbarber

Renew Puppet CA cert.

Not the perfect idea, but should alleviate the need to resign every cert.

What you need from existing puppet ssl directory:
ca/ca_crt.pem
ca/ca_key.pem

Create an openssl.cnf:
[ca]

rgs

Falsehoods programmers believe about prices

1. You can store a price in a floating point variable.
2. All currencies are subdivided in 1/100th units (like US dollar/cents, euro/eurocents etc.).
3. All currencies are subdivided in decimal units (like dinar/fils)
4. All currencies currently in circulation are subdivided in decimal units. (to exclude shillings, pennies) (counter-example: MGA)
5. All currencies are subdivided. (counter-examples: KRW, COP, JPY... Or subdivisions can be deprecated.)
6. Prices can't have more precision than the smaller sub-unit of the currency. (e.g. gas prices)
7. For any currency you can have a price of 1. (ZWL)
8. Every country has its own currency. (EUR is the best example, but also Franc CFA, etc.)

fadenb

Puppet 3.3.1

normal parser

root@precise64:~# puppet apply -e '$case = $::osfamily ? { somethingelse => "FNORD", Debian  => "upper case", debian => "lower case",} notify{"Result: ${case}":}'
Notice: Compiled catalog for precise64.muc.mayflower.de in environment production in 0.07 seconds
Notice: Result: upper case
Notice: /Stage[main]//Notify[Result: upper case]/message: defined 'message' as 'Result: upper case'
Notice: Finished catalog run in 0.05 seconds
root@precise64:~# puppet apply -e '$case = $::osfamily ? { somethingelse => "FNORD", debian  => "L case", Debian => "U case",} notify{"Result: ${case}":}'

Dewep

input {
    stdin {
    }
}

filter {
    mutate {
        replace => {
            "type" => "nginx-error"
        }

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

barentsen

sudo apt install libresample1 
wget http://mirrors.kernel.org/ubuntu/pool/universe/liba/libav/libavutil52_9.18-0ubuntu0.14.04.1_amd64.deb
sudo dpkg -i libavutil52_9.18-0ubuntu0.14.04.1_amd64.deb
wget http://mirrors.kernel.org/ubuntu/pool/universe/liba/libav/libswscale2_9.18-0ubuntu0.14.04.1_amd64.deb
sudo dpkg -i libswscale2_9.18-0ubuntu0.14.04.1_amd64.deb
wget https://www.dropbox.com/s/gg2i5wszrqkhzy8/clickshare_01.07.01-79_amd64.deb?dl=0#
sudo dpkg -i clickshare_01.07.01-79_amd64.deb

RafPe

Server 2 sockets,6 cores each, 2.4ghz

# Set ixgbe options
# Limit RSS queues to the number of physical cores per cpu
# Disable offload
# When you change this, you need to run the command and reboot for it to take.
echo "options ixgbe LRO=0,0 MQ=1,1 RSS=6,6 VMDQ=0,0 vxlan_rx=0,0" > /etc/modprobe.d/ixgbe.conf

# Shut down HT cores
for i in $(seq 1 2 23); do

Caligatio

# GROK Custom Patterns (add to patterns directory and reference in GROK filter for iptables events):
# GROK Patterns for iptables Logging Format
#
# Created 6 Aug 2016 by Brian Turek <[email protected]>
# Most of this was taken from another source but now I cannot find it for credit
#
# Usage: Use the IPTABLES pattern

NETFILTERMAC %{MAC:dest_mac}:%{MAC:src_mac}:%{ETHTYPE:ethtype}
ETHTYPE (?:(?:[A-Fa-f0-9]{2}):(?:[A-Fa-f0-9]{2}))