thinkpoet hongshibao

Screen Quick Reference

Basic

Description	Command
Start a new session with session name	`screen -S <session_name>`
List running sessions / screens	`screen -ls`
Attach to a running session	`screen -x`
Attach to a running session with name	`screen -r`

SSH agent forwarding and screen

When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.

This is enabled by adding the

ForwardAgent yes

option to any of your Host entries in ~/.ssh/config (or alternatively with the -A option). Don't set this option in a wildcard Host * section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.

One liner for deleting images from a v2 docker registry

Just plug in your own values for registry and repo/image name.

registry='localhost:5000'
name='my-image'
curl -v -sSL -X DELETE "http://${registry}/v2/${name}/manifests/$(
    curl -sSL -I \
        -H "Accept: application/vnd.docker.distribution.manifest.v2+json" \

	#!/usr/bin/env bash

	graceful_exit() {
	# include this line: trap graceful_exit TERM INT HUP
	echo "Exit requested..."
	local timeout=${1:-4}
	local list=""
	for c in $(ps -o pid= --ppid $$); do
	# request children shutdown
	kill -0 ${c} 2>/dev/null && kill -TERM ${c} && list="$list $c" \|\| true

	#!/usr/bin/env python
	# A simple script to suck up HTML, convert any images to inline Base64
	# encoded format and write out the converted file.
	#
	# Usage: python standalone_html.py <input_file.html> <output_file.html>
	#
	# TODO: Consider MHTML format: https://en.wikipedia.org/wiki/MHTML

	import os
	from bs4 import BeautifulSoup

thinkpoet hongshibao

Screen Quick Reference

Basic

SSH agent forwarding and screen

One liner for deleting images from a v2 docker registry

Table of Contents

set -e, -u, -x, -o pipefail