PracticalSession-3.md

# Practical Session 3

Working with `git`

## Using git (locally)

Ok let's do this:

- on your laptop (or geniux) create a new directory `xyz` and `cd` into it.
- create a new notebook with a plot
- and bring this into version control using `git`:
  - `git init`
  - `git add notebook.ipynb`
  - `git commit -m "commit message" `
- change the notebook - add another plot
- update the git repository:
  - `git commit -a -m "updated a plot"`



## Using `github.molgen.mpg.de`

Do this:

- Deposit **RSA** keys on the `github.molgen.mpg.de` webpage (-> Settings -> "SS and GPG keys" -> Add new SSH key) 

- Test whether you can login without password:
  ```
  ssh git@github.molgen.mpg.de
  ```
  Schould run and greet you with your name.

- Goto https://github.molgen.mpg.de/ and add a new repo. Give it a name, fill out the description, make it public, and create it:

  ![](figures/git1.png)

- On the next page you see commands how to "push" your local repo to github. Press the `SSH` button in the first blue box - and copy paste the commands in the third box on the command line.
  
  ![](figures/git2.png)

- Reload the `github` page - now your notebook should be there. Open it and see whther all the plots are there.


## Assignment 3

Please send a link to your `github.molgen.mpg.de` repo such that I can admire your plots.