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Nikolai Zujev jaymecd

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jaymecd / main.go
Created August 18, 2020 19:03 — forked from pteich/main.go
Example for using go's sync.errgroup together with signal detection signal.Notify to stop all running goroutines
package main
import (
"context"
"errors"
"fmt"
"os"
"os/signal"
"syscall"
"time"
@jaymecd
jaymecd / s3.batch.operations.manifest.split.sh
Last active June 10, 2020 08:45
#!/usr/bin/env bash
#
# Split single S3 Inventory manifest into sequential subsets.
#
# Usage:
# $ env INVENTORY_BUCKET=my-inventory INVENTORY_PATH=sample-name ./s3.batch.operations.manifest.split.sh
#
set -euo pipefail
@jaymecd
jaymecd / a_json_data_pivot_with_jq.md
Created June 2, 2020 11:57
This JQ one-liner to pivot JSON data

Pivot JSON data

This one-liner pivots data from group>users or user>groups:

$ cat incoming.json \
  | jq 'map(. as $in | .users[] | . as $u | {user:$u, group:$in.group}) | group_by(.user) | map({user:.[0].user, groups: map(.group)})'

[
 {
@jaymecd
jaymecd / Makefile
Last active March 18, 2020 11:38
Default Makefile with envvar guard
MAKEFLAGS += --warn-undefined-variables
SHELL := bash -o pipefail -c
.DEFAULT_GOAL := help
.PHONY: help all deps build
guardEnvVar = $(if $(value $(1)),,$(error env $(1) not defined))
# Note: help extracts title from ## comment just above the target, builds target/title grid and prints it pretty.
## Show help
@jaymecd
jaymecd / build_stig_windows_with_packer.md
Last active September 12, 2023 21:53
Packer with WinRM over HTTPS

Way to build Windows STIG/CIS hardened AMI on AWS.

Problem is that WinRM Basic authentication is blocked by GroupPolicy.

Therefore it's required to setup WinRM over HTTPS.

@jaymecd
jaymecd / invoke_via_winrm_https.ps1
Created October 16, 2019 08:55
Powershell: invoke command via winrm (NTLM over HTTPS)
# TEST WinRM connect
$targetHost = 'localhost'
$username = 'Administrator'
$password = 'PASSWORD'
$secret = ConvertTo-SecureString -String $password -AsPlainText -Force
$cred = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $username, $secret
$option = New-PSSessionOption -SkipCACheck -SkipCNCheck -SkipRevocationCheck
@jaymecd
jaymecd / time.ps1
Last active May 21, 2019 22:42
measure command time
function time([scriptblock]$scriptblock) {
$sw = [Diagnostics.Stopwatch]::StartNew()
. $scriptblock
$sw.Stop()
Write-Output ""
Write-Output " >> Execution time: $($sw.Elapsed)"
}
time { Install-Module -Name PSWindowsUpdate }
@jaymecd
jaymecd / python_decorator_guide.md
Created May 15, 2019 14:39 — forked from Zearin/python_decorator_guide.md
The best explanation of Python decorators I’ve ever seen. (An archived answer from StackOverflow.)

NOTE: This is a question I found on StackOverflow which I’ve archived here, because the answer is so effing phenomenal.

Q: How can I make a chain of function decorators in Python?

If you are not into long explanations, see [Paolo Bergantino’s answer][2].

@jaymecd
jaymecd / substr.js
Last active May 12, 2019 21:08
ES6 training
const substr = (str, start = 0, length = str.length) => {
if (start === 0 && length === str.length) {
return str;
}
if (start > str.length || length <= 0) {
return '';
}
const startIndex = (start < 0) ? Math.max(0, str.length - Math.abs(start)) : start;
@jaymecd
jaymecd / python-logging.md
Created May 8, 2019 07:31 — forked from mariocj89/python-logging.md
Understanding logging in Python

Logging trees

Introduction

When applications are running in production, they become black boxes that need to be traced and monitored. One of the simplest, yet main, ways to do so is logging. Logging allows us - at the time we develop our software - to instruct the program to emit information while the system is running that will be useful for us and our sysadmins.