Pablo Serrano pserrano

What are the Kubernetes certifications?

There are four Kubernetes certifications:

High Traffic Server Settings on RHEL / AlmaLinux / Rocky / EuroLinux / CentOS 8

I recently did some work to optimize the network configuration of an AlmaLinux 8 based web server that receives a lot of traffic.

Of course these settings also apply to RHEL / Rocky / EuroLinux / CentOS 8 (hereafter referred to as Linux 8.) I think these should also work on RHEL / AlmaLinux / Rocky / EuroLinux 9 as well but I have not yet tested them.

There is a lot of information on the web for this and it distills down to a minimum recommended configuration, and a recommended configuration.

The minimum recommended configuration should be sufficient for servers with less than 10Gb, and the recommended configuration should be sufficient for servers with 10Gb or more.

Generate ssl certificates with Subject Alt Names on OSX

Open ssl.conf in a text editor.

Edit the domain(s) listed under the [alt_names] section so that they match the local domain name you want to use for your project, e.g.

DNS.1   = my-project.dev

Additional FQDNs can be added if required:

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "[email protected]"

	package util

	import (
	"errors"
	"fmt"
	"net"
	)

	// useful links:
	// https://stackoverflow.com/questions/27410764/dial-with-a-specific-address-interface-golang

	function transfer
	if test (count $argv) -eq 0
	echo "No arguments specified. Usage:\necho transfer /tmp/test.md\ncat /tmp/test.md \| transfer test.md"
	return 1
	end

	## get temporarily filename, output is written to this file show progress can be showed
	set tmpfile ( mktemp -t transferXXX )

	## upload stdin or file

	Remove osxfuse if installed via homebrew:
	> brew uninstall osxfuse

	Install osxfuse binary and choose to install the MacFUSE compatibility layer:
	http://sourceforge.net/projects/osxfuse/files/latest/download?source=files

	Reboot (optional but recommended by osxfuse)

	Install ntfs-3g via homebrew:
	> brew update && brew install ntfs-3g

	#!/usr/bin/ruby
	# Create display override file to force Mac OS X to use RGB mode for Display
	# see http://embdev.net/topic/284710

	require 'base64'

	data=`ioreg -l -d0 -w 0 -r -c AppleDisplay`

	edids=data.scan(/IODisplayEDID.*?<([a-z0-9]+)>/i).flatten
	vendorids=data.scan(/DisplayVendorID.*?([0-9]+)/i).flatten

	LINT_IGNORES = ['rvm']

	namespace :lint do
	desc "Check puppet module code style."
	task :ci do
	begin
	require 'puppet-lint'
	rescue LoadError
	fail 'Cannot load puppet-lint, did you install it?'
	end

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048