Aamaanaa aamaanaa

intro, download, install & setup
basics, syntax
control flow
more types, data structures
methods & interfaces
concurrency
nice to know stuff
golang gotchas <-- especially if you are coming from python, ruby etc
workspace

Chat GPT "DAN" (and other "Jailbreaks")

File-opening flags in Go (By Adebayo Adams)

Go provides file-opening flags represented by constants defined in the os package. These flags determine the behavior of file operations, such as opening, creating, and truncating files. The following is a list of the flags and what they do.

os.O_RDONLY: Opens the file as read-only. The file must exist.
os.O_WRONLY: Opens the file as write-only. If the file exists, its contents are truncated. If it doesn't exist, a new file is created.
os.O_RDWR: Opens the file for reading and writing. If the file exists, its contents are truncated. If it doesn't exist, a new file is created.

!! underscore _ in filename == slash /
I'm using podman instead of Docker. Systemd files were generated by podman (not quadlet).
certbot image has to be pulled manually
before first start, a certificate has to be requested. Nginx won't start if it's not there. You can request one using certbot in standalone mode: podman run -it --rm -p 80:80 -v ~/nginx/data/letsencrypt:/etc/letsencrypt:z -v ~/nginx/log:/var/log:z certbot/certbot certonly --standalone --staging --dry-run --key-type ecdsa --rsa-key-size 4096 -d immich.domain.tld
ports forwarded and opened: 80/TCP, 443/UDP and 443/TCP

directory structure has to look like this. directories and logfiles may have to be created manually. check startup errors.

$ home - nginx

	// Copyright (c) 2015-2021, bacondither
	// All rights reserved.
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions
	// are met:
	// 1. Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer
	// in this position and unchanged.
	// 2. Redistributions in binary form must reproduce the above copyright

	package main

	import (
	"fmt"
	"io"
	"net"
	"time"
	)

	func main() {

	A blood black nothingness began to spin.

	Began to spin.

	Let's move on to system.

	System.

	Feel that in your body.

	#!/bin/bash

	dbus-monitor --system "type='signal',path='/org/freedesktop/UPower/devices/battery_BAT0',member='PropertiesChanged'" \| while read LINE; do
	echo ${LINE} \| grep battery_BAT0 \| grep -q PropertiesChanged
	if [ $? -eq 0 ]; then
	BATT_STAT=$(dbus-send --print-reply=literal --system --dest=org.freedesktop.UPower /org/freedesktop/UPower/devices/battery_BAT0 org.freedesktop.DBus.Properties.Get string:org.freedesktop.UPower.Device string:State \| awk '{ print $3; }')
	if [ $BATT_STAT -eq 1 ] \|\| [ $BATT_STAT -eq 4 ]; then
	LEVEL=$(tuned-adm list \| grep -q throughput-performance && echo "throughput-performance" \|\| echo "balanced")
	elif [ $BATT_STAT -eq 5 ]; then
	LEVEL="balanced"

	You will need to add you user to the 'apache' group first. Log out afhter you have done that.

	$ sudo mkdir /var/www/html/project
	$ sudo chown -R $USER:apache /var/www/html/project
	$ sudo chmod -R 775 /var/www/html/project

	package cache

	import (
	"sync"
	"time"
	)

	// Cache is a basic in-memory key-value cache implementation.
	type Cache[K comparable, V any] struct {
	items map[K]V // The map storing key-value pairs.