bri b-

On the host

Ensure these modules are loaded

cat /proc/sys/net/bridge/bridge-nf-call-iptables

Disable swap

sysctl vm.swappiness=0
swapoff -a

General notes

nix-channel and ~/.nix-defexpr are gone. We'll use $NIX_PATH (or user environment specific overrides configured via nix set-path) to look up packages. Since $NIX_PATH supports URLs nowadays, this removes the need for channels: you can just set $NIX_PATH to e.g. https://nixos.org/channels/nixos-15.09/nixexprs.tar.xz and stay up to date automatically.
By default, packages are selected by attribute name, rather than the name attribute. Thus nix install hello is basically equivalent to nix-env -iA hello. The attribute name is recorded in the user environment manifest and used in upgrades. Thus (at least by default) hello won't be upgraded to helloVariant.

@vcunat suggested making this an arbitrary Nix expression rather than an attrpath, e.g. firefox.override { enableFoo = true; }. However, such an expression would not have a key in the user environment, unlike an attrpath. Better to require an explicit flag for this.

TBD: How to deal with search path clashes.

Exporting (iCloud) Keychain and Safari credentials to a CSV file

Update (October 2021)

Exporting password + one-time code data from iCloud Keychain is now officially supported in macOS Monterey and Safari 15 (for Monterey, Big Sur, and Catalina). You can access it in the Password Manager’s “gear” icon (System Preferences > Passwords on Monterey, and Safari > Passwords everywhere else), or via the File > Export > Passwords... menu item). You shouldn't need to hack up your own exporter anymore.

Original, Obsolete Content (2014)

After my dad died, I wanted to be able to have access any of his online accounts going forward. My dad was a Safari user and used iCloud Keychain to sync his credentials across his devices. I don’t want to have to keep an OS X user account around just to access his accounts, so I wanted to export his credentials to a portable file.

	#!/bin/bash
	# Copyright 2024 - 2024, Jaremy Hatler
	# SPDX-License-Identifier: MIT

	## Dell R630 Fan Control Script

	# This script controls the fan speed on a Dell r630 server in response to the CPU temperature.
	#
	# In some cases (nonstandard firmware, aftermarket PCI cards, etc.), the internal fan controller
	# will consistently maintain high RPMs. This script uses IPMI to enable manual fan control and set

	#!/bin/sh
	#
	# /config/scripts/dhcp-client/post-hooks.d/set-addrgroup

	# To enable this script set the following variable to "yes"
	RUN="yes"

	if [ "$RUN" = "yes" ]; then
	tmpfile=$(mktemp /tmp/dhcp-script.XXXXXXXX)
	chmod -R 755 "${tmpfile}"