maniankara

openssl s_client -showcerts -servername www.example.com -connect www.example.com:443 </dev/null

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#!/bin/bash
# Bash script for generating OAuth token for Google admin user fetching

#1) on https://console.developers.google.com/ register project and associate API from library
# OUTPUT: client_id,client_secret
client_id="..."
client_secret="...."

#2) get authorization code at the following link using web browser
# OUTPUT: code

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# Without CA
openssl req -x509 -newkey rsa:4096 -sha256 -days 365 -nodes -keyout selfsigned.key -out selfsigned.crt -subj "/C=FI/ST=Uusimaa/L=Helsinki/O=Verifa Oy/OU=IT/CN=example.verifa.io/emailAddress=selfsigned@verifa.io" -addext 'subjectAltName=DNS:sample.verifa.io,DNS=sample.verifa.com'

# With CA (repeats some steps from above)
openssl req -newkey rsa:2048 -nodes -keyout selfsigned.key -out selfsigned.csr -subj "/C=FI/ST=Uusimaa/L=Helsinki/O=Verifa Oy/OU=IT/CN=server.test.com/emailAddress=test@test.com"
openssl req -x509 -sha256 -days 1825 -newkey rsa:2048 -keyout rootCA.key -out rootCA.crt -subj "/C=FI/ST=Uusimaa/L=Helsinki/O=Verifa Oy/OU=IT/CN=server.test.com/emailAddress=test@test.com" -passout pass:test123
openssl x509 -req -CA rootCA.crt -CAkey rootCA.key -in selfsigned.csr -out selfsigned.crt -days 365 -CAcreateserial -passin pass:test123

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kubectl get obj certs -o jsonpath="{.data['tls\.key']}"

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# List WSLs with versions
wsl --list --verbose

# Convert an existing WSL `Ubuntu-22.04` from WSL2 to WSL1
wsl --set-version Ubuntu-22.04 1

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name: listfiles

on:
  workflow_dispatch:

jobs:
  list-png-files:
    runs-on: ubuntu-latest
    outputs:
      file: ${{ steps.set-files.outputs.file }}

maniankara

Problem

1. Command

curl https://testhost

2. Certificate unknown authority error

: x509: certificate signed by unknown authority

Fix:

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version: '3'

services:
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.2
    environment:
      - cluster.name=docker-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits: