christianchristensen

(Note: this matches the pinout of Amazon: Cisco: HDE 6ft DB9 9-Pin Serial Port to RJ45 Cat5 Ethernet LAN Console Cable)

Female Serial:

 ________
 \54321 /
  \9876/
   ----

christianchristensen

systat -vmstat 1 systat -if 1 netstat -na sockstat -l netstat -s fstat top -m io -o write dtrace

christianchristensen

FreeBSD pkgng for the Raspberry Pi (ARMv6)

Background (pre-req: build packages)

• Building Packages with Poudriere
• See also
  • How To Set Up a Poudriere Build System to Create Packages for your FreeBSD Servers
  • BSD Now: Making a binary package repository with poudriere
  • Building a package repository for FreeBSD with poudriere and pkgng

christianchristensen

#!/bin/sh
# Pull manifest of overview metadata and output summary info.

TMPFILE=`mktemp /tmp/data_kcmo_org.data.XXXX.json`
curl http://data.kcmo.org/data.json | python -mjson.tool > $TMPFILE

date

echo -n 'Total entries: '
grep -c "\"identifier\":" $TMPFILE

christianchristensen

#!/usr/bin/env python

# http://www.chromium.org/developers/owners-files
# https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/8a57ce17e317c0213a95f7e504d13132badcdf2f/owners.py
# https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/master/owners_finder.py
# https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/master/tests/owners_unittest.py

import glob
import os
import owners

christianchristensen

Monitoring + Metrics

• Monitoring: Zabbix
• Metrics: OpenTSDB

Refs

• http://serialized.net/images/Signal_Noise_With_Notes.pdf
• https://code.google.com/p/rocksteady

christianchristensen

FreeBSD Handbook

Misc

• sbruno/How I install -current to make it a useable Desktop
• freebsd-wifi-build/build_tplink

---

christianchristensen

Disable cursor and sleep

# /etc/xdg/lxsession/LXDE/autostart
#@xscreensaver -no-splash
@xset s off
@xset -dpms
@xset s noblank

# /etc/lightdm/lightdm.conf
xserver-command=X -nocursor -s 0 dpms

christianchristensen

Consensus

A fundamental problem in distributed computing is to achieve overall system reliability in the presence of a number of faulty processes. This often requires processes to agree on some data value that is needed during computation. Examples of applications of consensus include whether to commit a transaction to a database, agreeing on the identity of a leader, state machine replication, and atomic broadcasts. wiki

• Paxos (wiki)
  • http://angusmacdonald.me/writing/paxos-by-example
• Zab
  • ZooKeeper
• Raft (wiki)

christianchristensen

Keybase proof

I hereby claim:

• I am christianchristensen on github.
• I am chrischris (https://keybase.io/chrischris) on keybase.
• I have a public key whose fingerprint is 8C90 2017 EE74 C670 9706 1E0B 39B0 C148 DF44 1D6F

To claim this, I am signing this object: