AoJ

cmake_minimum_required(VERSION 2.8)
project(sdnotify)

add_executable(sdnotify sdnotify.cpp)
target_link_libraries(sdnotify PUBLIC systemd)

AoJ

'''
The path is a directory by default
'''

def hdfs_list(path, subtract_one=True):
    fs = spark._jvm.org.apache.hadoop.fs.FileSystem.get(spark._jsc.hadoopConfiguration())
    list_status = fs.listStatus(spark._jvm.org.apache.hadoop.fs.Path(path))
    # file.getPath().getName(), file.getBlockSize(), file.getLen()
    files_size = [file.getLen() for file in list_status]
    totol_size_in_MB = sum(files_size) / 1024.0 / 1024.0

AoJ

Introduction to Z File System (ZFS)

What is Z File System (ZFS)?

Z File System or also known as ZFS was created by Matthew Ahrens and Jeff Bonwick in 2001 to be the next generation file system for Sun Microsystem's Solaris. In 2008 ZFS was ported to FreeBSD which at the same year a ZFS ported project for Linux is also started the project name was ZFS on Linux.

However since ZFS is under the Common Development and Distribution License it can't be included directly to Linux Kernel. To solve this many Linux distributions make an offer to install ZFS from their package manager.

AoJ

# Suspend process:
Ctrl + z 

# Move process to foreground:
fg

# Generate random hex number where n is number of characters:
openssl rand -hex n

# Execute commands from a file in the current shell:

AoJ

{ config, lib, pkgs, ... }:

with lib;

{
  imports =
    [ 
      <nixpkgs/nixos/modules/installer/cd-dvd/channel.nix>
      ./machine-config.nix
    ];

AoJ

Ladicle’s Emacs Configuration ver.2022

Outline

Package Management (link)

• leaf-keywords
  • el-get
  • hydra
• package-utils

AoJ

#!/bin/bash
# otel-cli-ideas.sh - some ideas I'm playing with for otel-cli to cover some
# use cases where manual spans or exec don't quite do the trick
#
# another cool outcome is you could run this without the collector in some
# cases without spamming your OTLP endpoint...
#
# I hope to OSS otel-cli under Apache 2 in early April 2021.

# maybe it could background itself and wait for events on a unix socket?

AoJ

from prometheus_client import Counter, start_http_server
from threading import Thread
import requests as re
import time

JOB_NAME = 'test'
INSTANCE = 'localhost'


def scrape_and_send(local_url: str, vm_url: str, scrape_interval: int):

AoJ

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

AoJ

Requirements

1. HDP-2.2 installed by Ambari
2. Install HDFS Client
3. Patience

Instructions

Setup