liuyangc3

package main

import (
	"fmt"
	"log"
	"net/http"
	"os/exec"
	"strings"
)

liuyangc3

Install awscurl

pip install awscurl

Query metrics on ec2

TOKEN=$(curl -s -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600")
CREDENTIAL=$(curl -s -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/meta-data/iam/security-credentials/amp-instance-role)

liuyangc3

# Reference: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1559.md

BASE_FEE_MAX_CHANGE_DENOMINATOR = 8
ELASTICITY_MULTIPLIER = 2

# Calculate expected base fee for block 12965001

current_block = 12965000 # London Upgrade block
# Get the following values from Etherscan: https://etherscan.io/block/12965000
parent_base_fee_per_gas = 1000000000 # 1 Gwei

liuyangc3

query {
  repository(name: "zen", owner: "HorizenOfficial") {
    pullRequests(first: 100, states: [MERGED], orderBy: {field: CREATED_AT, direction: DESC}) {
      totalCount
      nodes {
        title
        state
        checksUrl
        mergedAt
      }

liuyangc3

#!/bin/sh

# this script allow you run a container attached to node with root privilege
# see https://securek8s.dev/exercise/65-privileged/
# usage:
# kubectl get nodes
# ./k8s_attach_node.sh <node name>

node=${1}
if [ -n "${node}" ]; then

liuyangc3

#!/bin/bash

# https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_providers_create_oidc_verify-thumbprint.html

set -e

if [ ! -z "$DEBUG" ] ; then
    set -x
fi

liuyangc3

#!/bin/sh
parse_yaml() {
   local prefix=$2
   local s='[[:space:]]*' w='[a-zA-Z0-9_]*' fs=$(echo @|tr @ '\034')
   sed -ne "s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \
        -e "s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\1$fs\2$fs\3|p"  $1 |
   awk -F$fs '{
      indent = length($1)/2;
      vname[indent] = $2;
      for (i in vname) {if (i > indent) {delete vname[i]}}

liuyangc3

Keybase proof

I hereby claim:

• I am liuyangc3 on github.
• I am liuyangc3 (https://keybase.io/liuyangc3) on keybase.
• I have a public key ASDvUyBrV6i1MHOYQgY3SyotpR62nkvo3gkKtlUB8UNZxAo

To claim this, I am signing this object:

liuyangc3

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

liuyangc3

iTerm2 — search keyword and copy and paste text

Output example

Command + F to start search mode