mysticaltech

Dashboard with a Raspberry Pi

Run Raspberry 3 in digital signage mode with Chromium Web browser on a TV screen

Pre-work

Download Raspbian Jessie Lite

Follow installation instructions

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# Redis Cheatsheet
# All the commands you need to know


redis-server /path/redis.conf  # start redis with the related configuration file
redis-cli                      # opens a redis prompt


# Strings.

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All right, just a quick recap on this issue for people looking to setup Elasticsearch 5.x. There's a workable solution in the above comments, but was a bit of trial an error. Hope this speeds things up for others:

Edit /etc/sysctl.conf, add vm.max_map_count = 262144 at the bottom. Then run sysctl -p to load the changes.

Create a new Elasticsearch instance with dokku, per manual. I've only tested this with the latest 5.x release.

export ELASTICSEARCH_IMAGE="elasticsearch"
export ELASTICSEARCH_IMAGE_VERSION="5.6.12"
dokku elasticsearch:create lollipop
This will result in the "unable to connect" error. But now worries.

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After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install postgresql@9.6
brew unlink postgresql@9.6
brew link postgresql

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sudo crontab -e

# And copy paste:

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

0 */12 * * * root test -x /usr/bin/certbot -a \! -d /run/systemd/system && perl -e 'sleep int(rand(3600))' && certbot -q renew

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Install and configure Sendmail on Ubuntu

This should help you get Sendmail installed with basic configuration on Ubuntu.

1. If sendmail isn't installed, install it: sudo apt-get install sendmail
2. Configure /etc/hosts file: nano /etc/hosts
3. Make sure the line looks like this: 127.0.0.1 localhost yourhostname
4. Run Sendmail's config and answer 'Y' to everything: sudo sendmailconfig
5. Restart apache sudo service apache2 restart

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#!/bin/bash
#
# chkconfig: - 91 35
# description: Starts and stops the TurboVNC Server
#
### If you are using LDAP or another distributed authentication system, then
### be sure to add any services needed for your distributed authentication
### system to the Required-Start line below.
#
### BEGIN INIT INFO

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FROM alpine:3.3
MAINTAINER Tom Maiaroto <tom@outdoorsy.co>

# Install packages
RUN apk --update --repository http://dl-3.alpinelinux.org/alpine/edge/main add \
    freetype-dev \
    libjpeg-turbo-dev \
    libpng-dev \
    libwebp-dev \
	php7 \

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Getting Started

Do yourself a favor and login as root to save yourself some time and headaches:

$ sudo su -

Install unattended-upgrades:

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