Data | Splint.rs

Base 16

1 min read · data

Base 16 numbers often use 0x at the start, so '10' just means '10', but 0x10 means '10 in base 16' which means '16'. For small numbers, use printf. 1printf "%x" $NUMBER For any number, use bc. 1fortune | md5sum | cut -d' ' -f1 | tr [:lower:] [:upper:] | bc Inputting base 16 uses ibase=16. Outputting base 10 uses …

Board Games with Recfiles

1 min read · data recfiles games

Requirements Recfiles You can play with a board games database from boardgamegeek.com. Download the Database 1mkdir board_games 2cd board_games 3curl -Lo bg.zip 'https://www.kaggle.com/api/v1/datasets/download/threnjen/board-games-database-from-boardgamegeek' 4unzip bg.zip The header line shows fields with a bunch of …

Commit for Another

1 min read · data git

Requirements Setup git You can make Alice the author, while you are still the commiter: 1name="Alice Bobinson" 2email="alice@email.com" 3 4git add ${file} 5git commit --author="${name} <${email}>" Or, make Alice both the committer and the author: 1git -c user.name="${name}" -c user.email="${email}" commit -m …

Convert a scanned pdf to text

1 min read · data pdf ocr

How to translate pdfs to text (results are very poor, and will need lots of corrections). Dependencies Search for 'tesseract english' (or whatever language). Arch: tesseract-data-eng and poppler-utils Script 1pdftoppm -png file.pdf test 1for x in *png; do 2 tesseract -l eng "$x" - >> out.txt 3done

Convert Spreadsheets

1 min read · data sc-im

Convert between spreadsheet formats with sc-im. 1sc-im --quiet --quit_afterload --nocurses --export_csv ${file}.xlsx 2sc-im --quiet --quit_afterload --nocurses --export_tab ${file}.sc 3sc-im --quiet --quit_afterload --nocurses --export_mkd ${file}.csv 4sc-im --quiet --quit_afterload --nocurses --export_txt ${file}.tsv

e-mail

2 min read · data smtp

This is bare-bones, original, primitive e-mail. Install opensmtpd (or similar), then ncat or nc or netcat (this mysterious cat has many names). Start the opensmtpd service, then use netcat to speak with the mail-daemon: 1nc localhost 25 The computer should respond with code 220, which means 'I am listening'. 220 hex …

Edit gpg encrypted files with vim

1 min read · vim data gpg comfy

Requirements GPG Basics vim basics The vim-gnupg plug-in lets vim edit gpg-encrypted files as if they were unencrypted. It's probably in your package manager. If not, you'll need to endure the faff of following the instructions.

git hooks

1 min read · data git

Check out the sample hooks: 1cd ${git_repo} 2ls .git/hooks 3head .git/hooks/pre-commit.sample Add a hook to check the shell scripts in $GIT_REPO before making a commit: 1echo '#!/bin/sh 2shellcheck *.sh' > .git/hooks/commit-msg 3chmod u+x .git/hooks/commit-msg Committing The git hooks will not work on other people who …

git stash

1 min read · data git

Requirements Setup git Save file-changes without committing anything. Change a file: 1file=README.md 2fortune >> ${file} 3git diff 4git stash save List which stashes you have: 1git stash list 2 3 stash@{1}: WIP on master: c21f102 init git Make a new file, then stash it: 1otherfile=file.log 2fortune > ${otherfile} 3git …

git-lfs

1 min read · data git

Requirements Setup git Git Large File Storage ('LFS') needs to change your ~/.gitconfig to check out those binary files: 1cat ~/.gitconfig 2git lfs install 3cat ~/.gitconfig Then track some filetypes with: 1cd $git_repository 2ext=ttf 3git lfs track "*.$ext" Or a directory with: 1git lfs track "images/" Track the …