davidjenni

# calculate IP address range from CIDR notation
# https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

function cidrToIpRange {
    param (
        [string] $cidrNotation
    )

    $addr, $maskLength = $cidrNotation -split '/'
    [int]$maskLen = 0

davidjenni

#!/bin/sh
# Configure homebrew permissions to allow multiple users to call 'brew'.
# Any user from the staff group will be able to manage the homebrew and cask installation on the machine.

# in newer macOS version (>= HighSierra ?), changing perms on /usr/local itself is rejected
sudo chgrp -R staff /usr/local/*
sudo chmod -R g+w /usr/local/*

davidjenni

#!/bin/bash
# Brings up a Linode VPS with Debian kernel with git, SSH, Docker and firewall installed
# <UDF name="sys_hostname" label="System hostname" default="myvps" example="Name of your server, i.e. linode1." />
# <UDF name="user_name" label="User account name" example="This is the account that you will be using to log in." />
# <UDF name="user_password" label="User password" />
# <UDF name="user_sshkey" label="Public Key for user" default="" example="Recommended method of authentication. It is more secure than password log in." />

# fail immediately if cmd fails; unset env variables will fail the script:
set -e
set -u