johnmccabe

#!/bin/bash
#Jason T. 2-6-2018

# Check specifically for the run command
if [[ $# -ge 2 && $1 == "run" ]]; then
    # Tell docker to share the following folders with the base system
    # This allows the docker containers to find CUDA, cuDNN, TensorRT
    LIB_MAPS="/usr/lib/aarch64-linux-gnu \
              /usr/local/cuda \
              /usr/local/cuda/lib64"

johnmccabe

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb

johnmccabe

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

johnmccabe

#!/bin/sh
echo "Running dhclient change hostname script for Ubuntu. reason=${reason}"
timestamp=$(date +%s)
if grep localhost /etc/hostname; then
    echo "Current hostname:"
    cat /etc/hostname
    echo "Attempting to configure hostname"
    if [ "x$reason" = "xBOUND" ]; then

        hostname=$new_host_name

johnmccabe

#!/bin/sh
# Filename:     /etc/dhcp/dhclient-exit-hooks.d/sethostname
# Purpose:      Used by dhclient-script to set the hostname of the system
#               to match the DNS information for the host as provided by
#               DHCP.
# logs in /var/log/syslog
#

echo dhclient-exit-hooks.d/sethostname: reason = $reason, interface = $interface

johnmccabe

require 'cgi'
require 'digest/md5'
require 'net/https'
require 'uri'

module Jekyll
  class GistTag < Liquid::Tag
    def initialize(tag_name, text, token)
      super
      @text           = text

johnmccabe

import pyroute2
from pyroute2 import IPRoute
from pyroute2.iproute import transform_handle
from pyroute2.netlink import NLM_F_ACK
from pyroute2.netlink import NLM_F_REQUEST
from pyroute2.netlink.rtnl.tcmsg import tcmsg
 
PLUG_CLASS = '1:4'
PLUG_QDISC = '40:'
 

johnmccabe

This example is the second of three in the Path Transitions tutorial; see the previous example for context.

The desired pairing of numbers for path interpolation is like this:

M x0, y0 L x1, y1 L x2, y2 L x3, y3 L xR, y4
   ↓   ↓    ↓   ↓    ↓   ↓    ↓   ↓
M xl, y0 L x0, y1 L x1, y2 L x2, y3 L x3, y4

Where xl is some negative value off the left side, and xr is some positive value off the right side. This way, the first point ⟨x0,y0⟩ is interpolated to ⟨xl,y0⟩; meaning, the x-coordinate is interpolated rather than the y-coordinate, and so the path appears to slide off to the left. Likewise, the incoming point ⟨xr,y4⟩ is interpolated to ⟨x3,y4⟩.