Jason Riddle jason-riddle

macos

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1	localhost

Setting up Qemu with a tap interface

There are two parts to networking within QEMU:

The virtual network device that is provided to the guest (e.g. a PCI network card).
The network backend that interacts with the emulated NIC (e.g. puts packets onto the host's network).

Example: User mode network

Using SSH through airplane WiFi that blocks port 22

Many aircraft that offer wifi only permit access to machines on port 80/443, the standard http(s) ports. If you want to SSH, you have to set up an intermediate machine that hosts the SSH service on either port 80 or 443. An easy (and free) way to do this is via a Google free-tier micro instance. These instances have a 1 GB transfer ceiling per month, but so long are you are only transmitting textual data a few days per month, this limit should not be easily exceeded. Set up one of these VMs via the Google Cloud console, and select CentOS 7 as the disk image. Make sure that you allow http/https traffic on the instance, the two checkboxes in the Firewalls section of the VM settings. Optionally, set a static external IP address for your server in the VM config, in case you don't want to look up the IP each time. Then, ssh into the new VM (the IP address will be listed as the "external IP" in the list of instances) and edi

Common Ledger CLI Commands

Income vs expenses this month?

$ ledger balance income expenses --period "this month"

What did my budget look like at a certain date?

AWS CLI JMESPath cheatsheet

Random query recipes of JMESPath for the AWS CLI tools that I might have written or stumbled upon.

Examples

How to use Mac KeyChain to store GitHub repos credentials?

You know the pain, you cloned a repo over HTTPS, and now Git asks you for your password each time you want to push or pull.

Chances are you already have the git credential-osxkeychain command installed. If not, just install Git with brew: brew install git.

Once installed, just tell Git to use the KeyChain to store your credentials:

git config --global credential.helper osxkeychain

Note: everything here is pretty specific to my usage/accounts and not written for public use... You'll probably have to tweak a bunch of stuff.

$ bean-extract config.py ~/Downloads # the csvs should be in here

Docker compose as a systemd unit

Create file /etc/systemd/system/[email protected]. SystemD calling binaries using an absolute path. In my case is prefixed by /usr/local/bin, you should use paths specific for your environment.

[Unit]
Description=%i service with docker compose
PartOf=docker.service
After=docker.service

	# Edit this configuration file to define what should be installed on
	# your system. Help is available in the configuration.nix(5) man page
	# and in the NixOS manual (accessible by running ‘nixos-help’).

	{ config, pkgs, ... }:

	{
	imports =
	[ # Include the results of the hardware scan.
	./hardware-configuration.nix

	$docker run -m 200MB openjdk:8u131-jre-alpine java -XshowSettings:vm -version

	VM settings:
	Max. Heap Size (Estimated): 444.50M
	Ergonomics Machine Class: server
	Using VM: OpenJDK 64-Bit Server VM

	openjdk version "1.8.0_131"
	OpenJDK Runtime Environment (IcedTea 3.4.0) (Alpine 8.131.11-r1)
	OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)