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btrfs For Beginners

I wanted to retain the original page contents just in case it went down or changed.

Taken from https://www.howtoforge.com/a-beginners-guide-to-btrfs.

This guide shows how to work with the btrfs file system on Linux. It covers creating and mounting btrfs file systems, resizing btrfs file systems online, adding and removing devices, changing RAID levels, creating subvolumes and

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#!/bin/bash

# Usage: unpack <pathto file> <workdir>

set -e

archive=$1
workdir=$2

filename=$(basename "$1")

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HOSTNAME = %x{hostname}.chomp

PROM_FILE = ARGV[0] != 'test' ? '/var/lib/node_exporter/textfile_collector/smartctl.prom' : '/tmp/smartctl.prom'

DEVICES = [
  '/dev/sda',
  '/dev/sdb',
  '/dev/sdc',
  '/dev/sdd',
  '/dev/sde',

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-- show running queries (pre 9.2)
SELECT procpid, age(query_start, clock_timestamp()), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(query_start, clock_timestamp()), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

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#include "mach_gettime.h"
#include <mach/mach_time.h>

#define MT_NANO (+1.0E-9)
#define MT_GIGA UINT64_C(1000000000)

// TODO create a list of timers,
static double mt_timebase = 0.0;
static uint64_t mt_timestart = 0;

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#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <stdbool.h>
#include <arpa/inet.h>

typedef struct buffer
{
    uint32_t length;
    uint32_t capacity;

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#
# A simple stop watch for a quick timer to check app performance
#
# @see https://blog.dnsimple.com/2018/03/elapsed-time-with-ruby-the-right-way/
# 
# @example Basic Usage
#   timer = Stopwatch.new
#   timer.start   #=> 59539.814152996
#   timer.stop    #=> 59544.700881683
#   timer.elapsed #=> 4.886728687000868

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#version 330 core

in vec2 v_texcoord;
in vec4 v_color;

uniform sampler2D u_tex;
uniform mat4 u_combined;

out vec4 f_color;

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/**
 * @author Inscrutabilis / mailto:[email protected]
 */

/*
 * Generates a geodesic sphere geometry
 * By default, it is 1x1x1 octahedron, as a first approximation to sphere
 * It will return more sphere-like object if you specify iterations > 0
 * But please keep in mind that it generates (4 ^ iterations) * 8 faces
 * Radius argument overrides default sphere radius (1)

warmwaffles

I do know that it’s really easy to convert them into an ISO file, and then mount the ISO in debian based linux.

sudo apt-get install bchunk

The syntax from bchunk is as follows:

bchunk [-v] [-p] [-r] [-w] [-s]