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 …

Give shell script options

1 min read · shell script

Requirements Making Scripts Place this in a file called options.sh, and make it executable. 1#!/bin/sh 2 3echo "This script is called $0" 4 5while getopts oe: choice ; do 6 case "$choice" in 7 o) 8 echo "This is option number '${OPTIND}'." 9 ;; 10 e) echo "Option number '${OPTIND}' uses this variable: '${OPTARG}'." 11 …

GPG Basics

2 min read · data GPG

Making keys Generate keys: 1gpg --full-generate-key Follow the guide. Encrypting a file 1gpg -r malinfreeborn@posteo.net -e file -r specifies the recipient. Check you have an encrypted version of your file. Changing Expiration Dates 1gpg --list-keys 2# or... 3gpg -k ... and then use the second part of 'pub', which is …

GPG Password Entry

1 min read · vim secrets TUI

Requirements GPG Basics vim basics Check your current gpg-agent configuration: 1gpgconf --list-options gpg-agent Create file, if it doesn't exit ~/.gnupg/gpg-agent.conf:

Force terminal prompts for passwords pinentry-mode loopback # Optional: specify which pinentry program to use pinentry-program …

groff

1 min read · documentation typography logic

Basic Documents Great a file called name.ms, with the following content: .TL Groff-Time .AU Ghost .NH How to Format Groff Documents. .PP Groff needs two new lines to show a new paragraph. Then make a pdf from the document with: groff -ems name.ms -Tpdf > name.pdf The commands must be placed at the start of a line. The …

hard links

1 min read · basics links

A hard link is one file which exists in multiple locations. Each file has an ID, which is kept on the hard disk's partition. Each hard link has the same ID, because they are the same file. This ID is called the 'inode'. Create a file, and a hard link: 1fortune > $file_1 2mkdir -p x/y/z/ 3ln $file_1 x/y/z/$file_2 Have a …

How to Learn `vim`

1 min read · vim learning TUI

Uninstall vim. Install vi. Write a few blog posts. The ancient wisdom is correct - everyone should start with vi. But the standard wisdom fails to mention writing. So people just 'try to remember', then they edit a couple of configuration files with vim, then stop, because it's a pain to think about keystrokes while …

ijq

1 min read · data json TUI

Analyse json easier with ijq. 1column -J -ts: -H PW,GID,shell -N User,PW,UID,GID,Description,Home,shell /etc/passwd > host.json 2ijq !$ If you get stuck, try adding .[].