aidanhs

[cargobomb-prod cargobomb]$ df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs         15G   92K   15G   1% /dev
tmpfs            15G   72K   15G   1% /dev/shm
/dev/xvda1       99G   31G   68G  31% /
/dev/xvdb       985G  801G  134G  86% /home/ec2-user/cargobomb/work
[cargobomb-prod cargobomb]$ df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs         15G   92K   15G   1% /dev
tmpfs            15G   72K   15G   1% /dev/shm

aidanhs

use std::io::{BufRead, BufReader};
use std::process::{Child, Command, Stdio};

fn main() {
    for id in 1..64_000 {
        let mut child = Command::new("echo").arg(id.to_string())
            .stdout(Stdio::piped()).stderr(Stdio::piped())
            .spawn().unwrap();
        output(&mut child, false);
        child.wait().unwrap();

aidanhs

--- runtime-gdb.py	2015-05-05 17:03:21.520510629 +0100
+++ runtime-gdb-hacks.py	2015-05-05 17:05:24.416677753 +0100
@@ -369,6 +369,41 @@
 		ptr = ptr[linkfield]
 
 
+class AidanCmd(gdb.Command):
+	"List all goroutines."
+
+	def __init__(self):

aidanhs

The instructions are:

$ go build udocker.go
$ chgrp docker udocker
$ chmod g+s udocker
$ mv udocker /usr/local/bin

I have performed the first three and therefore have this:

aidanhs

PLEASE DON'T USE THIS GUIDE

It's over 9 years old (as of 2024-02-18), there are many better guides! You might like https://rust-unofficial.github.io/too-many-lists/

% Let's build a binary tree!

Let's build a binary tree of strings in Rust. To recap, each node in a binary tree:

1. must have a value

aidanhs

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.write('echo /');
  console.log('kill me now');
  setTimeout(function () {
    res.write('tmp/xx\n');
  }, 50000);
}).listen(8080, '127.0.0.1');
console.log('Server running at http://127.0.0.1:8080/');

aidanhs

int main(void) {

  int x = EM_ASM_INT({
    Module.print('I received: ' + $0);
    return $0 + 1;
  }, 100)

  return x;

}

aidanhs

.PHONY: clean do

CFLAGS=-O0 -m32
EMFLAGS=\
	--memory-init-file 0

do: clean x.o y.o z.o
	emar rc libtest.a y.o
	emar rc libtest.a x.o
	emranlib libtest.a

aidanhs

dd if=/dev/urandom bs=1M count=1000 of=/tmp/bigfile

# Note! This will cause your computer to slow down while it puts
# all files it's accessing back in memory
sudo sync
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'

sleep 5
dd if=/tmp/bigfile bs=1M of=/dev/null

aidanhs

package main

import (
	"database/sql"
	"database/sql/driver"
	"net/http"
	"runtime"
	"time"
)