The power of GNU Readline - part 2

In part 1 we looked at some Control key and Meta key sequences as well as the Backspace and DEL keys in the context of GNU Readline.

The full-length notes (available here) contain a brief summary of what we covered and introduce cutting and pasting the GNU Readline way, with some examples.

Links

Consistent BackSpace and Delete Configuration

Wikipedia article on GNU Readline

GNU Readline manual: https://tiswww.cwru.edu/php/chet/readline/rluserman.html (Note that the widely advertised address http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html seems not to work any more. This one, which I found through the main GNU site, seems OK though)

Previous episode:

The power of GNU Readline - part 1

Resources:

Detailed notes

Hydraulic Heavy Scale Project

by David Whitman

Why? - to weigh a heavy object yourself

Not very difficult. Can be done in about 1/2 hour by someone who has experience doing this type of stuff. Lots longer for beginners.

Things you will need: A drill motor, The right size bit for a small pilot hole and the right size bit for a fitting to connect the jack cylinder to the pressure gauge, A Thread TAP to make threads to connect the hydraulic 90 degree fitting to the jack, Some pipe dope is not a bad idea, A 90 degree appropriately sized fitting to connect a pressure gauge to the jack, a vise is nice, a wrench to dismantle the jack, A way to accurately measure the cylinder bore (best is a caliper) and some oil to refill the jack.

This link is a youtube to help you visualize the steps. https://www.youtube.com/watch?v=ZBmxkWK_OFA

Hate this episode? No problem. Do a better one

In the previous episode of this series, you set up an OpenVPN server. In this episode, Klaatu walks you through:

Installing OpenVPN on a client machine.

Generating a key and certificate request.

Signing a client cert from the server.

Configuring the client.conf file.

Configuring the client routing table to use the VPN subnet.

Pinging the server over VPN!!!

Where to go from here?

Your next steps should be to investigate how your org wants to use VPN, how your clients actually want to join the VPN (Network Manager has some nice features that makes joining a VPN fairly transparent). Have fun!

viper4android

http://vipersaudio.com/blog/?page_id=48

magisk

https://forum.xda-developers.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445

brief introduction

myself

Hi, I'm Brian in Ohio

inspiration for show

I wanted to tell a little about my trials and tribulations of finding a solution to taking org mode on the road. What's org mode? Listen to my last episode or do a duckduckgo to find out.

parameters

After switching from using a bullet journal to using emacs-org-mode as my organizing device I immediately saw that lugging a laptop everywhere was not going to work for me. I wanted to be able to access org-mode, especially the agenda view, anywhere I might be. Laptops with limited battery life and a large physical presence were not going to work for me.

mobile-org app

The first solution I tried, and the most obvious, was the mobile-org app. Its available for android or ios. I can only attest to the android version. Its an easy from the play store. This solution didn't work for me for a number of reasons. First, the documentation for the setup is terrible, and I became frustrated by the workflow and could not get useful results using the app. Mobile-org seems to be built around using dropox. In order to get around that I tried various methods of syncing my org files using onboard storage. Seeing this wasn't going to work I bit the bullet setup a dropbox account installed the clients, one on my slackware laptop and the other on my phone only to find dropbox doesn't support this application anymore. A little digging around and it seems the API used by mobile-org isn't up to snuff any more so, fail. I cut my loses and moved on to another possible solution.

pi-top

My next crack at solving the portable org mode problem was getting a pitop laptop https://pi-top.com/. Pitop is a laptop based on a raspberrypi. I won't go into the details of the device here but I'll say my idea for using this device was its advertised 8+ hour battery life. My old linux laptops rarely give me 2 hours of life So even though the pitop was physically larger than I wanted I gave it a whirl. Lets just say the battery does last 8+ hours, it just can't survive many recharges. 2 battery packs later I gave up on the pitop and went looking for something else.

pocketchip

I heard klaatu mention a device called a pocketchip on his gnuworld order podcast http://gnuworldorder.info/. I looked into it and here I thought might be a device that could work. Pocketchip https://getchip.com/pages/pocketchip is a handheld linux computer. After ordering the device I began setting it up for my use case. There are plenty of tutorials on the pocketchip website on how to extend the usefulness of this product. The size of the device was good and the battery life was ok. Some people complain about the chicklet keyboard but I actually did not mind it to much. It took some fiddling to get the emacs keybindings I use to work on the odd keyboard layout, but its a linux computer so there's plenty of information out there. I used a thumb drive as a repository for my org files, wrote a couple of scripts to sync up the files with whatever device the drive was plugged into and wala a mobile org solution! Alas, the pocketchips demise was its build quality. The heart of the pocketchip, the system board's usb mini plug fell off, and then one system tweak later I bricked the device. I'll recover it eventually, you can program it through the gpio pins, but this was a quest for portable-org-mode, not fixing pocketchips, so onward.

raspberry pi tablet

I saw a build of a raspberry pi tablet that looked very nice http://www.stefanv.com/electronics/a-

Useful Bash functions - part 3

Overview

This is the third show about Bash functions. These are a little more advanced than in the earlier shows, and I thought I'd share them in case they are useful to anyone.

As before it would be interesting to receive feedback on these functions and would be great if other Bash users contributed ideas of their own.

Full Notes

Since the notes explaining this subject are long, they have been placed here.

Links

Previous HPR episodes in this group Useful Bash functions:

Part 1: 'pad' and 'yes_no' functions

Part 2: 'yes_no' revisited

Download the read_value, check_value and read_and_check functions and the trace of read_value.

In this episode, Klaatu demonstrates how to:

Install OpenVPN

Generate certificates for your OpenVPN server

Generate a private key for your OpenVPN server

Configure the /etc/openvpn/server.conf file

Start the OpenVPN daemon

In case it is not clear, you can follow along with Klaatu, using the exact same options and configuration values as he is using for a successful install. You do not need to change

In the next episode, he will demonstrate how to do all of the above for OpenVPN clients.

VPN is a big topic that warrants a whole miniseries unto itself, so this and the next episode concentrate on getting a VPN up and running, with clients connected and pinging back to the server on a dedicated subnet. Additional config options based on your specific use-case are left for you to explore on your own.

A sample post-receive git hook:

#!/usr/bin/tcsh

foreach arg ( $< )

set argv = ( $arg )

set refname = $1

end

set branch = `git rev-parse --symbolic --abbrev-ref $refname`

echo $branch

if ( "$branch" == "master" ) then

echo "Branch detected: master"

echo "Do some stuff here."

else if ( "$branch" == "dev" ) then

echo "Branch detected: dev"

echo "Do something else here."

else

echo "Do something entirely different here."

endif

The Info-Underground guys consider why capitalism does (or maybe doesn't) work, why people use it as a tool for a better life (or maybe don't), and what the source of ambition, commercial aspiration, and greed truly is (or maybe isn't).

The investigation continues!

Guest voice in this and episode 3 by Gort.