Alex Ellis alexellis

Read-only FS on Arch Linux ARM

Unlike your typical computer where you usually shutdown properly, I cannot rely on this during the use of my Raspberry Pi. If the Raspberry Pi is improperly shutdown too many times, data corruption in the file system leading to unbootable SD card may result. So we should use a read-only file system.

Full instructions and explanations are obtained from this link but you can run these commands directly. I modified some of the instructions for personal convenience.

Login with default username: alarm, password: alarm

#Optionally enable root over SSH. The rest of these instructions assume u are in root.

No problem,

run

git filter-branch --msg-filter "cat - && echo && echo 'Signed-off-by: Your Name <[email protected]>'" HEAD~2..HEAD

To sign-off the last two commits.

Then force to push them to the remote repo with the -f option:

Convert sequence of JPEG images to MP4 video

Simple glob:

ffmpeg -r 24 -i '*.JPG' -s hd1080 -vcodec libx264 timelapse.mp4

Start from DSC_0079.JPG

ffmpeg -r 24 -f image2 -start_number 79 -i DSC_%04d.JPG -s hd1080 -vcodec libx264 timelapse2.mp4

React "Hello World" Examples

Below are a small collection of React examples to get anyone started using React. They progress from simpler to more complex/full featured.

They will hopefully get you over the initial learning curve of the hard parts of React (JSX, props vs. state, lifecycle events, etc).

Usage

You will want to create an index.html file and copy/paste the contents of 1-base.html and then create a scripts.js file and copy/paste the contents of one of the examples into it.

method 1

sudo /usr/local/McAfee/AntiMalware/VSControl stopoas

alternatively

sudo defaults write /Library/Preferences/com.mcafee.ssm.antimalware.plist OAS_Enable -bool False
sudo /usr/local/McAfee/AntiMalware/VSControl stop
sudo /usr/local/McAfee/AntiMalware/VSControl reload

Generated private key

openssl genrsa -out server.key 2048

To generate a certificate

openssl req -new -x509 -key server.key -out server.pem -days 3650

	#include <sys/types.h>
	#include <sys/stat.h>
	#include <fcntl.h>

	#include <stdio.h>
	#include <string.h>
	#include <errno.h>

	#include <linux/i2c-dev.h>

	module("resty.consul", package.seeall)

	_VERSION = '0.1.0'

	function service_nodes(service)
	local http = require "resty.http"
	local json = require "cjson"
	local hc = http:new()

	local upstream = ""

	# check if job exists
	curl -XGET 'http://jenkins/checkJobName?value=yourJobFolderName' --user user.name:YourAPIToken

	# with folder plugin
	curl -s -XPOST 'http://jenkins/job/FolderName/createItem?name=yourJobName' --data-binary @config.xml -H "Content-Type:text/xml" --user user.name:YourAPIToken

	# without folder plugin
	curl -s -XPOST 'http://jenkins/createItem?name=yourJobName' --data-binary @config.xml -H "Content-Type:text/xml" --user user.name:YourAPIToken

	# create folder

	# Changed to use content-type flag instead of header: -H 'Content-Type: application/json'
	siege -c50 -t60S --content-type "application/json" 'http://domain.com/path/to/json.php POST {"ids": ["1","2","3"]}'