Rafael Mundel rmundel

Anonymising PDFs

PDF metadata

Metadata in PDF files can be stored in at least two places:

the Info Dictionary, a limited set of key/value pairs
XMP packets, which contain RDF statements expressed as XML

PDF files

This can reduce files to ~15% of their size (2.3M to 345K, in one case) with no obvious degradation of quality.

ghostscript -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Other options for PDFSETTINGS:

/screen selects low-resolution output similar to the Acrobat Distiller "Screen Optimized" setting.
/ebook selects medium-resolution output similar to the Acrobat Distiller "eBook" setting.
/printer selects output similar to the Acrobat Distiller "Print Optimized" setting.
/prepress selects output similar to Acrobat Distiller "Prepress Optimized" setting.

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Running Windows 10 on AWS EC2

Downloading the image

Download the windows image you want.

AWS vmimport supported versions: Microsoft Windows 10 (Professional, Enterprise, Education) (US English) (64-bit only)

So Home wont work.

I'm not using this or VestaCP anymore, so I can't confirm if still working or not.

I've made a new web template to make Laravel work easily on VestaCP, and so I wouldn't have to change my Laravel installation, if I ever wanted to deploy it elsewhere.

Each file should be put in /usr/local/vesta/data/templates/web/apache2

Then, when you edit your domain/site, you can change the web template to Laravel and just upload your whole project into public_html

	#!/bin/sh
	#
	# CloudFlare Dynamic DNS
	#
	# Updates CloudFlare records with the current public IP address
	#
	# Takes the same basic arguments as A/CNAME updates in the CloudFlare v4 API
	# https://www.cloudflare.com/docs/client-api.html#s5.2
	#
	# Use with cron jobs etc.

	# === Optimized my.cnf configuration for MySQL/MariaDB (on Ubuntu, CentOS, Almalinux etc. servers) ===
	#
	# by Fotis Evangelou, developer of Engintron (engintron.com)
	#
	# ~ Updated September 2024 ~
	#
	#
	# The settings provided below are a starting point for a 8-16 GB RAM server with 4-8 CPU cores.
	# If you have different resources available you should adjust accordingly to save CPU, RAM & disk I/O usage.
	#

	# Dont forget to set the env variable "certdomain", and either fill in your email below or use an env variable for that too.
	# Also note that this config is using the LetsEncrypt staging server, remove the flag when ready!

	Resources:
	sslSecurityGroupIngress:
	Type: AWS::EC2::SecurityGroupIngress
	Properties:
	GroupId: {"Fn::GetAtt" : ["AWSEBSecurityGroup", "GroupId"]}
	IpProtocol: tcp
	ToPort: 443

	USE master;
	Go
	SELECT 'DROP DATABASE '+ name
	FROM sys.databases WHERE name like 'sp16%';
	GO

	###
	# Proxmox or other server kernel params cheap tune and secure.
	# Try it if you have heavy load on server - network or memory / disk.
	# No harm assumed but keep your eyes open.
	#
	# @updated: 2020-02-06 - more params used, adjust some params values, more comments on params
	#

	### NETWORK ###