Matheus Lozano LozanoMatheus

💭

with great changes comes great improvements

With great changes come great improvements

LozanoMatheus / example_switching_version_asdf.sh

Created February 17, 2021 19:36

How to switch between runtime versions on Bash, Zsh or Fish

LozanoMatheus / example_asdf.sh

Last active February 17, 2021 19:25

How to use asdf to manage multiple runtimes and switch between versions

	## Add the awscli plugin
	asdf plugin add awscli

	## List the awscli version
	asdf list-all awscli

	## Install awscli version 2.1.27
	asdf install awscli 2.1.27
	## or to install the latest of awscli
	asdf install awscli latest

LozanoMatheus / 01-test_vars_inside_function.sh

Last active February 11, 2021 01:25

Bash variables - Explaining their differences - defining the vars inside of a function

	#!/usr/bin/env bash

	function test_vars(){
	declare -g declare_g="declare_g_output"
	declare -x declare_x="declare_x_output"
	declare declare_only="declare_only_output"

	export export_only="export_only_output"

	local local_only="local_only_output"

LozanoMatheus / 01-test_vars_outside_function.sh

Last active February 11, 2021 01:24

Bash variables - Explaining their differences - defining the vars outside of a function

	#!/usr/bin/env bash

	function print_vars(){
	echo "func_declare_g->${declare_g}<-"
	echo "func_declare_x->${declare_x}<-"
	echo "func_declare_only->${declare_only}<-"

	echo "func_export_only->${export_only}<-"

	# echo "func_local_only->${local_only}<-"

LozanoMatheus / example_trap.sh

Last active February 20, 2022 01:41

Using Bash trap when a command fails

LozanoMatheus / 01-verify_oidc.sh

Last active January 22, 2021 19:58

Using AWS IAM Role in a EKS / Kubernetes POD

	## First of all, check if you already have an OpenID Connect
	### List your EKS cluster OIDC URL
	aws eks describe-cluster --name <CLUSTER_NAME> --query "cluster.identity.oidc.issuer"

	#### Output
	https://oidc.eks.<REGION>.amazonaws.com/id/<OIDC_ID>

	### List your
	aws iam list-open-id-connect-providers

LozanoMatheus / cleaning_docker.sh

Created December 17, 2020 22:00

Cleaning Docker images, networks, volumes, etc

	## Cleaning Docker images, networks, volumes, etc

	function flush_docker() {
	[[ "${1}" == "all" ]] && local delete_docker_volumes="--volumes"
	docker system df
	docker rm -f $(docker ps -qa) &> /dev/null
	Docker_Prune_All="$(docker system prune --all ${delete_docker_volumes} --force)"
	tail -1 <<< "${Docker_Prune_All}"
	}

LozanoMatheus / ssh-config

Last active December 11, 2020 09:01

Accessing an EC2 via SSH using AWS SSM

	## A basic set up of ~/.ssh/config in your local machine/client
	## ssh i-0a1b2c3d4e5f6g7h8i9

	Host i-*
	User ec2-user
	ProxyCommand bash -c "aws ssm start-session --target %h --document-name AWS-StartSSHSession --parameters 'portNumber=%p'"
	IdentityFile ~/.aws/test-mlozano001.pem


	## In this case, it will search for a running instance that has the Tag:Name set to example-ssh-via-aws-ssm

LozanoMatheus / ssh_ec2_ssm.sh

Created December 10, 2020 19:41

Accessing an EC2 via SSH using AWS SSM

	aws ssm start-session --target ${Instance_Id}

	## or

	ssh ${Instance_Id}

LozanoMatheus / get_ip.sh

Created November 30, 2020 21:41

Get Linux IP without any tool

	#!/usr/bin/env bash

	## Get the primary and secundary IPs
	awk '/\\|--/ && !/\.0$\|\.255$/ {print $2}' /proc/net/fib_trie

	## Get only the primary IPs
	awk '/32 host/ { print i } {i=$2}' /proc/net/fib_trie