Krzysztof Wilczyński kwilczynski

Random numbers in bash et al

There is a variable $RANDOM than you can read in bash or zsh to get a random number beteen 0 and 32767. Here in zsh on my (old) mac:

% echo $RANDOM
13757
% echo $RANDOM
16896

$argon2id$v=19$m=64,t=512,p=2$G/DQSn2+4afFDXZRdR3Vlw$DBvv46nt3EEkY5ehfDVfQQ

Keybase proof

I hereby claim:

I am kwilczynski on github.
I am kwilczynski (https://keybase.io/kwilczynski) on keybase.
I have a public key whose fingerprint is 12D2 7D5D 8C8E 9BF1 AABC 7C7C 7C64 768D 3DE3 34E7

To claim this, I am signing this object:

QEMU arm64 cloud server emulation

This is basically a rehash of an original post on CNXSoft - all credit (particularly for the Virtio device arguments used below) belongs to the author of that piece.

Download the latest uefi1.img image. E.g. ubuntu-16.04-server-cloudimg-arm64-uefi1.img from https://cloud-images.ubuntu.com/releases/16.04/release/

Download the UEFI firmware image QEMU_EFI.fd from https://releases.linaro.org/components/kernel/uefi-linaro/latest/release/qemu64/

Determine your current username and get your current ssh public key:

Here is the best setup (I think so :D) for Keychron + Linux

Make Fn + F-keys work

Keychron Keyboards on Linux use the hid_apple driver (even in Windows/Android mode), both in Bluetooth and Wired modes. By default, this driver uses the F-keys as multimedia shortcuts and you have to press Fn + the key to get the usual F1 through F12 keys.

In order to change this, you need to change the fnmode parameter for the hid_apple kernel module. Here's some documentation on it, but a quick summary can be found below:

	name: "Auto-merge Dependabot Pull Request for Dockerfile updates"

	permissions:
	pull-requests: write
	contents: write

	on:
	pull_request_target:
	branches:
	- main

	FROM registry.access.redhat.com/ubi8/python-39:latest AS builder

	ARG psycopg2_version=2.9.5

	USER 0

	RUN set -eux && \
	mkdir -p /build && \
	chown 1001 /build

	package main

	import (
	"fmt"
	"net/url"
	"strings"
	"unicode/utf8"
	)

	func normalizePassword(input string, escape bool) (output string) {

	$ cat test.jsonnet
	local validateIP(ip) =
	local aux(value) =
	local mask = std.parseHex("ffffffff");
	local octets = std.prune([if x != "" then std.parseInt(x) else null for x in std.split(value, '.')]);
	if std.length(octets) != 4 then
	false
	else
	local masked = ((octets[0] << 24) \| (octets[1] << 16) \| (octets[2] << 8) \| (octets[3] << 0) & mask);
	if masked < 0 then false else masked <= mask;

	package main

	import (
	"context"
	"flag"
	"fmt"
	"net"
	"os"
	"time"