jonatanblue

#!/usr/bin/env bash

set -o pipefail -o errtrace -o errexit -o nounset
shopt -s inherit_errexit

[[ -n "${TRACE:-}" ]] && set -o xtrace

trap 'stacktrace "Error trapped rc=${PIPESTATUS[@]}, see trace above"' ERR

stacktrace() {

jonatanblue

#!/usr/bin/env python3

from neo4j import GraphDatabase
import logging
import os
import time
import signal
from neo4j.exceptions import ServiceUnavailable

class App:

jonatanblue

# procps - for ps
# net-tools - for netstat

apt update && apt install -y procps telnet net-tools curl less vim

jonatanblue

#!/bin/bash
grep_this=xvda1; d1=0; d2=0; while true; do d1=$(df | grep ${grep_this} | awk '{ print $4 }'); sleep 1; d2=$(df | grep ${grep_this} | awk '{ print $4 }'); diff=$(( ${d1} - ${d2} )); echo $diff; done

jonatanblue

# grep
tail -f file | grep --line-buffered my_pattern

# sed
stdbuf -o0 tail -f /var/log/syslog | sed 's/Dec/LOOL/'

# credits:
# Thanks to @amblina for collecting these.

jonatanblue

Problem

When running docker-compose I get this error:

docker-compose --version
> ERROR: Dependency conflict: an older version of the 'docker-py' package is polluting the namespace. Run the following command to remedy the issue:
> pip uninstall docker docker-py; pip install docker

jonatanblue

#!/bin/bash
#
# Set a secret environment variable on the command line without saving it in history:
export MY_TOKEN="$(read token && echo ${token})"
# type/paste secret value
echo ${MY_TOKEN}
# value is echoed

jonatanblue

# Clone repo 1
git clone repo1
cd repo1

# Use subtree on the folder you want to move
git subtree split -P dir1 -b split-dir1-branch

# Check out branch and move files
git checkout split-dir1-branch
mkdir dir1

jonatanblue

#### Output from `terraform plan`:

$ terraform plan
Refreshing Terraform state prior to plan...

aws_ecs_cluster.example_cluster: Refreshing state... (ID: arn:aws:ecs:us-east-1:123456789012:cluster/example-cluster)
aws_iam_role.ecs_instance: Refreshing state... (ID: ecs-instance)
aws_iam_role.ecs_service_role: Refreshing state... (ID: ecs-service-role)
aws_ecs_task_definition.sinatra_backend: Refreshing state... (ID: sinatra-backend)
aws_security_group.ecs_instance: Refreshing state... (ID: sg-432b2038)

jonatanblue

#Pre-req: install gcloud (Google Cloud CLI)

PROJECT_NAME=${1}
CLUSTER_NAME=kubernetes-lab-1
GOOGLE_REGION=europe-west1-d
brew update
brew install kubernetes-cli
brew install gcloud
gcloud config set project $PROJECT_NAME
gcloud config set compute/zone $GOOGLE_REGION