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

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 colons, which will …

calcurse

1 min read · data calendar daylight savings

Setup The UK government keeps an ics file with clock. 1wget https://www.gov.uk/when-do-the-clocks-change/united-kingdom.ics 2calcurse -i united-kingdom.ics

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 …

git

2 min read · data

Starting New Machines 1git config --global user.email "$YOUR_EMAIL" 1git config --global user.name "$YOUR_NAME" New Git Start a git in directory $DIR: 1mkdir $DIR && cd $DIR 1git init Make a file explaining what the project does: 1vim README.md Add this to the git: 1git add README.md Then make the initial commit, …

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 Your git hooks will not enter the repository, but …

git subtree

1 min read · data git subtree

Pulling a Subtree from an existing git The project has subdirectories sub-1, sub-2, sub-3. The first should be its own repository, but should also retain its own history. First, we extract its history as an independent item, and make that into a seprate branch. 1git subtree split --prefix=sub-1 -b sub If you want …

git-lfs

1 min read · data 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 changes to .gitattributes: …

git-secret

1 min read · data git

This utility is largely useless, as it can only identify people by their email. So if someone has multiple GPG keys associated with one email, the tool will not work. A broken tool is better than a tool which will break soon.