putnamhill

# print value pairs from an array in lower case
jq --raw-output '.[] | "\(.key_1 | ascii_downcase) \(.key_2 | ascii_downcase)"'

# convert `key=value` lines into `{"key":"value"}` json
jq --raw-input 'split("=") | {(.[0]):.[1]}' some.conf | jq --slurp 'add'

# validate json (bad)
echo '{hello: "there"}' | jq . >/dev/null 2>&1 && echo good json || echo bad json
  bad json

putnamhill

#!/usr/bin/perl -w

use Getopt::Long;
# use diagnostics;

sub usage {
	my $name = $0;
	$name =~ s/.*\///;
	print <<EOT;
Usage: $name [options] in-list other-list

putnamhill

#!/usr/bin/perl -w

use Net::CIDR;
use Getopt::Long;

# Net::CIDR one liner:
#   perl -mNet::CIDR -ne 'print if Net::CIDR::cidrlookup($_, ("10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"))'
#
# TODO: add ip address validation

putnamhill

## setting up a personal git repository that you can push change sets to
## ssh-host:  a host defined in ~/.ssh/config (see: ssh_config(5))
## camaro: the name of the repo

# on a remote host or local filesystem:
git init --bare camaro.git  # (option: use --shared if there are other contributors)

# on local host cd to camaro directory:
git remote add origin ssh-host:[path/]camaro.git
# (for origin on local filesystem: git remote add origin file:///media/volume-name/camaro.git)

putnamhill

#!/bin/bash

get_data() {
	# if the parameter is a local file just cat it (for testing) otherwise try curl
	{ test -r "$1" && cat "$1" || curl -s "$1"; } | \
		jq --raw-output \
			'.[] | "\(.symbol | ascii_downcase) \(.price_usd)"'
}

process() {

putnamhill

#!/bin/sh

# sample usage:
#   ontouchdo malformed.html 'clear; xmllint --noout --valid malformed.html 2>&1 | head -n20'
#
# Now fix some things in malformed.html and save. See the remaining errors in real time. Ctrl-c to quit.

[ ! -r "$1" ] && echo 'Nothing to watch.' && exit 1
[ ! -n "$2" ] && echo 'Nothing to do.' && exit 1

putnamhill

CREATE USER 'someuser'@'localhost' IDENTIFIED BY 'cleartext-password';
GRANT SELECT,INSERT,UPDATE,DELETE ON `database`.* TO 'someuser'@'localhost';

putnamhill

# Use awk to to redirect docker build output to stderr for visual feedback
# while capturing the image id on stdout when the build is sucessfull

ID=$(docker build . | awk '{print > "/dev/stderr"} END {if (/^Successfully built /) print $NF; else exit 1}')

# given docker volume path, return local storage path
doc2loc(){ docker inspect --format "{{range .Mounts}}{{if eq .Destination \"$1\"}}{{.Source}}{{end}}{{end}}" $2;}

putnamhill

#!/bin/bash

START=$(date +%s)
read -s -n1 -p $'Press a key when done.\n'
ELAPSED_SECONDS=$(bc <<< "scale=10; ($(date +%s) - $START)")
if [ $ELAPSED_SECONDS -gt 60 ]; then
  ELAPSED_MINUTES=$((ELAPSED_SECONDS / 60))
	ELAPSED_SECONDS=$((ELAPSED_SECONDS - ELAPSED_MINUTES * 60))
	echo -n "$ELAPSED_MINUTES minutes "
fi

putnamhill

telnet smtp.example.com 25
    Trying 203.0.113.1...
    Connected to smtp.example.com.
    Escape character is '^]'.
    220 example.com running My Bitchin Mail Server 1.0.0
HELO example.org
    250 example.com hello example.org (198.51.100.1)
MAIL FROM:<postmaster@example.org>
    250 2.1.5 sender OK
RCPT TO:<someone@example.com>