% CHEATSHEET(7) Version 1.0 | Cheatsheet for stuff Hugh forgets
% Hugh Rundle

NAME
====

**cheatsheet** - tips and reminders for Hugh.

DESCRIPTION
===========

This is a man page to remind Hugh of some basic commands and techniques he uses but forgets a lot in git, Python etc.

EXAMPLES
========

**git**

`git branch -d [name of branch to delete]`

: Delete a git branch

`git reset [file]`

: *Unstage* file but retain contents

`git _reset_ [commit]`

: *Undo* all commits after *commit*, preserving changes locally

`git reset HEAD --hard`

: *Undo* all changes to tracked files (since last commit)

`git clone [url]`

: Download project and its history

`git merge [branch]`

: Merge changes from *branch* into the current local branch

`git fetch [remote] pull/[id]/head:[branchname]`

: Where *remote* is the remote name you want to fetch from, *id* is the PR id, and *branchname* is the name you want to give to the new LOCAL branch you will create with this command. e.g. *fetch bookwyrm pull/999/head:testing*

**python**

`python -m http.server [port]`

: Spins up a web server with file root wherever you called this from, on *port*

`venv`

: TODO

**Docker**

`docker volume prune`

: Delete all volumes not being used by a currently-running process.

`docker exec -d [container] [command]`

: Execute a *command* inside the running *container* as a daemon (background task)

**hashes and random strings**

`openssl rand -hex [number]`

: Create a random string with *number* of bytes, using hex

`openssl rand -base64 [number]`

: Create a random string with *number* of bytes, using base64

`echo -n "string to hash" | md5`

: returns an md5 hash of the string

`md5 big_huge_file.iso`

: returns md5 hash of the file

`openssl md5 big_huge_file.iso`

: also returns md5 hash of the file

**Duck Duck Go**

*https://duckduckgo.com/?q=password+strong+32*

: Strong random password

*https://duckduckgo.com/?q=qr+code+your+text+here*

: Get a QR code for returning whatever text you entered


SEE ALSO
====
git(1) python(1) md5(1)