Pick an installed Linux kernel on Ubuntu and make it stick: hold its packages
so apt can't reap it, make it the GRUB default, and build its initramfs if
one is missing.
Ubuntu makes it easy to boot an older kernel once and surprisingly fiddly to
keep one. The menu entry indices shift every time a kernel is added or
removed, /etc/default/grub gets replaced by package upgrades, and
unattended-upgrades will happily autoremove the kernel you were relying on.
| #!/usr/bin/env bash | |
| set -euo pipefail | |
| # usb-port-to-pci.sh | |
| # Map a USB device/port to the backing PCI USB controller (BDF like 0000:03:00.0). | |
| # Usage: | |
| # ./usb-port-to-pci.sh --watch | |
| # ./usb-port-to-pci.sh 1:3 # BUS:DEV from `lsusb` | |
| # ./usb-port-to-pci.sh 046d:c332 # VID:PID from `lsusb` | |
| # ./usb-port-to-pci.sh --bus 1 # show which PCI controller owns USB bus 1 |
| #!/bin/bash | |
| # Scans all available local networks for the host specified by `MAC_ADDRESS` | |
| # then connects to it over SSH with the provided parameters. | |
| # Useful for hosts whose root partitions are encrypted that also have Dropbear SSH | |
| # set up in the bootloader as described at https://www.cyberciti.biz/security/how-to-unlock-luks-using-dropbear-ssh-keys-remotely-in-linux/ | |
| # Replace these values as appropriate | |
| MAC_ADDRESS="01:23:45:67:89:ab" # Letters must be lowercase | |
| SSH_PORT=1234 | |
| USER="root" |
I edited my Reddit comments using a version of Power Delete Suite that I modified to do the following:
%encoded_permalink% somewhere in your text.
user and permalink: https://example.com/path/to/reddit_backup.html?user=USER&permalink=%encoded_permalink%My fork is available here. If you want to do this too, make sure to run this scrip
| <?php | |
| /* | |
| Plugin Name: Force Login | |
| Plugin URI: https://wordpress.org/plugins/wp-force-login/ | |
| Description: Easily hide your WordPress site from public viewing by requiring visitors to log in first. Activate to turn on. | |
| Version: 5.4 | |
| Author: Kevin Vess | |
| Author URI: http://vess.me/ | |
| Text Domain: wp-force-login |
| # See here for a detailed discussion: https://albertarmea.com/post/alexa-tree/ | |
| # See https://github.com/alexa-pi/AlexaPi/wiki/Audio-setup-&-debugging | |
| # to get a better idea of how to set things in here | |
| # Level of log output | |
| # default: INFO | |
| # set to DEBUG for verbose logging | |
| logging: INFO |
| #!/usr/bin/env python | |
| """ | |
| animatronic_mouth.py | |
| This script animates a motorized mouth on a Raspberry Pi GPIO pin so that it | |
| appears to be speaking alongside the audio on the specified PulseAudio source | |
| (which usually should be a sink's monitor). | |
| Find PA_SOURCE with `pactl list` and look for a monitor device that corresponds |
This is a set of scripts that calibrates and calculates a depth map from a stereo camera. It is primarily written with this ELP stereo camera in mind, but it theoretically should work with other hardware.
See for a full writeup.
| import numpy as np | |
| import cv2 | |
| # Set up specifically for the ELP 1.0 Megapixel Dual Lens Usb Camera Module ... | |
| # https://www.amazon.com/ELP-Megapixel-Camera-Module-Biometric/dp/B00VG32EC2/ref=sr_1_4?ie=UTF8&qid=1502756603&sr=8-4&keywords=stereo+camera | |
| # This camera enumerates as two separate cameras, hence the separate `left` and | |
| # `right` VideoCapture instances. For a proper stereo camera with a common | |
| # clock, use one VideoCapture instance and pass in whether you want the 0th or | |
| # 1st camera in retrieve(). |
I hereby claim:
To claim this, I am signing this object: