Posts Tagged “bash”

Tutorials about the bash shell

• Easy Access of Cloudformation Lambda Environment Variables. 11 September 2023
  • amazon-web-services
  • aws-lambda
  • bash

  Sometimes you want to run your lambda function deployed as a cloudformation stack locally for testing purposes but you don’t want to hard code any of the underlying resources into your environment. These resources might be things like DynamoDB tables, SNS topics or SQS urls. Their names aren’t hard coded, and shouldn’t be hard coded otherwise you have a singleton stack. Sometimes you’re just a bit too impatient to spin everything up using the SAM cli, and don’t want to debug docker issues, so this helps.

• Computing Most Chatty People in IRC 03 May 2022
  • awk
  • bash
  • statistics

  Recently I was trying to figure out who was most active on the IRC server I frequent. IRC by it’s very nature leaves log files so that you have a record of your conversations in your control. So you can perform some processing on them to determine various statistics. This is a one liner to compute that.

• Using a Bash Script to Generate Random Fake Data To Insert Into DynamoDB 30 March 2021
  • amazon-web-services
  • bash
  • cloudformation
  • database
  • dynamodb
  • programming
  • tutorial

  I’ve been studying for my developer associate certification on Amazon Web Services. I’ve been practicing with the various streaming solutions like SQS and Kinesis lately. I’ve wanted to branch into using DynamoDB and capturing changes. To do that I needed to generate a lot of take data.

• A Brief and Painless Introduction To Bash 27 January 2021
  • awk
  • bash
  • curl
  • grep
  • grep
  • presentation
  • shell
  • tutorial
  • xargs

  A pretty decent introduction to Bash for pipelines and interactive use.

• Finding Jekyll Posts to Update With Cover Images 10 January 2021
  • bash
  • grep
  • jekyll
  • notes
  • refactor-code
  • shell
  • snippet
  • tutorial

  I recently updated my site to make use of cover images on the post listing. I wanted to make sure that I got all of the posts that need to be updated. I used grep to find posts which had an image in them, but no cover attribute in their front-matter.

• Advent of Code Input Getter 03 December 2020
  • advent-of-code
  • automation
  • bash
  • linux
  • tutorial

  I wrote a bash function to get my daily Advent of Code input. It assumes that you are in a directory ending in the pattern year/day, where year is the year you’re doing the problems. Here’s the code

• Using jq and bash for JSON processing 06 November 2020
  • bash
  • cplug
  • docker
  • jq
  • json
  • linux
  • presentation
  • tutorial

  This is a lightning talk I gave to the CPLUG November 2020 meeting on how to use jq with bash for dealing with JSON in modern tooling. NOTE: use the space bar to scroll.

• Inspecting All Running Docker Containers 29 October 2020
  • bash
  • docker
  • json
  • linux
  • snippet
  • tutorial

  I just discovered how to run inspect on all running docker containers.

• A Lazy Way to Collect Runtime Stats About Running Docker Containers 23 July 2020
  • bash
  • containers
  • docker
  • performance
  • statistics
  • tutorial

  So I was recently messing with Docker to keep up on my skills, and I wanted to see how much resources were required by each container over a given time period. So I came up with the following command to run in the terminal to collect it.

• Compressing All Git Repositories On Your Machine 27 June 2019
  • bash
  • git
  • linux
  • shell
  • tutorial

  So I recently felt the need to compress all the git repositories on my machine. This was mainly because I wanted to reduce the number of files I had to wait to backup. So here’s the commands I used to make that happen.

• Incrementing a Semantic Version String in Bash 30 April 2019
  • bash
  • snippet
  • tutorial

  I wrote a bash function that takes a semantic version string and bumps the version number. It supports all 3 layers. I needed it for the deploy script I was working on. It’s fairly trivial, I just thought I would share it.

• Temperature Monitoring on Linux 21 October 2018
  • bash
  • linux
  • tutorial

  Here’s a little shell function to view your system thermometers. Most people would just tell you to install the lm-sensors package, but that’s another package. Why do that when Linux presents it through the /sys filesystem.

• Fortran Subroutine Extractor 15 July 2018
  • awk
  • bash
  • fortran
  • refactor-code

  I’ve been working on a fortran codebase with a lot of code duplicated between subroutines, so I came up with this little bash function using awk to extract subroutines, so I can find the difference between them.

• A Brief Introduction to AWK 30 December 2017
  • awk
  • bash
  • programming
  • tutorial

  This will be brief introduction to awk and it’s many uses. I will show a few brief segments about various uses of awk and when it comes in handy for certain tasks. For more detail one should read the Awk User’s Manual.

• Analyzing Your Takeout Data From Google Fit 27 June 2017
  • analysis
  • bash
  • google-fit
  • r-lang
  • statistics
  • tutorial

  Google allows you to export your data from various products. In this post I show how one can run analysis on my data from Google Fit to find various pieces of information using the basic bash command line tools.

• Finding the Largest File Stored in Your Git Repository 30 January 2017
  • bash
  • git
  • linux
  • programming
  • sed
  • xargs

  This command will find the largest file from the output of git ls-files which outputs the path to each of the files stored in git below your current directory.

• Calculating the Size of Your Video Library 07 December 2016
  • bash
  • ffmpeg
  • linux
  • programming
  • shell
  • snippet

  This command will calculate the size of your movie and video library in days. You can modify the awk command as you see fit to calculate the time lengths.