max-i-mil

Linux Virtual Machines with Private Network on an Apple M1 Device

Background

The aim was to be able to:

1. Run multiple Linux VMs on an Apple M1/ARM device
2. Use Apple's HVF for native performance speeds
3. Configure VMs to allow network access to each other
4. Configure VMs to allow access to the internet
5. Not rely on custom modifications of software

kigster

#!/usr/bin/env bash
# vi: ft=sh
#
# https://gist.github.com/kigster/8ddebf9fddff25620e64d558dd4d56b7
#
# © 2019-2022 Konstantin Gredeskoul, Inc., All rights reserved.
# MIT LICENSE
# ————————————————————————————————————————————————————————————————
# This script verifies that the ruby interpreter (either the one in
# the $PATH, or the one specified by the -r / --ruby option) is linked

mperham

=begin
This script attempts to reproduce poor glibc allocator behavior within Ruby, leading
to extreme memory fragmentation and process RSS bloat.

glibc allocates memory using per-thread "arenas".  These blocks can easily fragment when
some objects are free'd and others are long-lived.

Our script runs multiple threads, all allocating randomly sized "large" Strings between 4,000
and 40,000 bytes in size.  This simulates Rails views with ERB creating large chunks of HTML
to output to the browser. Some of these strings are kept around and some are discarded.

crisidev

function password_encode(password)
    local bcrypt = require 'bcrypt'
    return bcrypt.digest(password, 12)
end

function check_password(password, encoded_password)
    local bcrypt = require 'bcrypt'  
    return bcrypt.verify(password, encoded_password)
end

agile6v

#!/bin/bash
#
# dockerpsns - proof of concept for a "docker ps --namespaces".
#
# USAGE: ./dockerpsns.sh
#
# This lists containers, their init PIDs, and namespace IDs. If container
# namespaces equal the host namespace, they are colored red (this can be
# disabled by setting color=0 below).
#

Kalaivanimurugan

Rails.application.eager_load!
ActiveRecord::Base.descendants # It returns all models and its attributes.
ApplicationRecord.descendants.collect(&:name) # It returns only the model names

leafsummer

Linux pstree shows running processes as a tree. The tree is rooted at either pid or init if pid is omitted. If a user name is specified, all process trees rooted at processes owned by that user are shown.
Install pstree

#On Mac OS
brew install pstree
 
#On Fedora/Red Hat/CentOS
yum install psmisc #using psmisc package for pstree
 
#On Ubuntu/Debian APT

darcyparker

#!/usr/bin/env bash

#Build and install neovim for Debian
#See: https://neovim.io/
#See: https://github.com/neovim/neovim/wiki/Building-Neovim#quick-start

#See: https://gist.github.com/darcyparker/153124662b05c679c417

#Save current dir
pushd . > /dev/null || exit

JunichiIto

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher	aliased to	description
a_truthy_value	be_truthy	a truthy value
a_falsey_value	be_falsey	a falsey value
be_falsy	be_falsey	be falsy
a_falsy_value	be_falsey	a falsy value

aishfenton

# sudo gem install bson
# sudo gem install bson_ext
# sudo gem install yajl-ruby
# sudo gem install json
# sudo gem install msgpack

require 'rubygems'
require 'benchmark'
require 'yaml'
require 'bson'