Demo¶

UW Geospatial Data Analysis
CEE498/CEWA599
David Shean

Preparation and discussion¶

Make sure all students are on Jupyterhub whitelist (UW netid)
Distribute link to course Jupyterhub, have students start server
Discuss remote computing - underlying infrastructure, computer somewhere in Google data center in CA or OR
Close tab in Jupyterlab - demonstrate persistence
Ask about OS? Anybody using Linux? All of you!
Distribute assignment link through Github classroom

Basic git/Github workflow¶

Clone assignment locally:
git clone https://github.com/UW-GDA/01-shell-github-dshean.git
- Alternatively, create a new repo called gda_test on Github:
```
git clone https://github.com/dshean/gda_test.git  
cd gda_test  
ls -l
```
Pick a text editor
- Discuss text editors, pick one for command line, or use Jupyterlab text editor
- https://web.stanford.edu/class/cs107/resources/editors
Edit README.md and add your name
Commit the change

git status
git add README.md
git status
git commit -m "Added my name to README.md"
git status

Discussion of local vs origin¶

Open web browser to view origin repo on Github
git push
Refresh page, verify README.md was updated

Edit README.md on Github, commit directly¶

Pull changes to local repo¶

git pull
git log

Add a new file to the repo¶

Create a new text file¶

nano git_reflections.txt
Add some text “Git is …”
Follow above add, commit, push

Create a new text file¶

Discuss extensions (.sh vs. .txt or .py)
vim myawesomescript.py

Add some lines:

#! /usr/bin/env python
print("Pancakes rule!")

Commit the change¶

git status
git add myawesomescript.py
git status
git commit -m "Added myawesomescript.py"

Try to execute script, doesn’t work¶

./myawesomescript.py

Check permissions¶

ls -l ./myawesomescript.py

Change permissions¶

chmod +x myawesomescript.py
ls -l myawesomescript.py
./myawesomescript.py

Commit permission change¶

git status
git diff myawesomescript.py
git add myawesomescript.py
git status
git commit -m "Change permissions on myawesomescript.py"

Review log, master is ahead of origin¶

git log
git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit

Push to origin¶

git push
git status

Review log, both origin and master are same¶

git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit

Other topics to discuss¶

https://stackoverflow.com/questions/572549/difference-between-git-add-a-and-git-add
Tab completion
Shell history (use up arrow)
du and df
top and ps
ssh and scp
tmux and screen
Discuss filesystem
- Output from which ls
- Go to /
- Explore /bin
Discuss executables
$PATH
bits, bytes

for loop

for i in solutions.txt words README.md
do
    ls $i
done
#One line:
for i in solutions.txt words README.md; do ls $i; done

Introduce assignment¶

more words
file words
How are we going to count the number of words? Online search term discussion
- wc -l words
How to submit answers: create a new text file, copy your command and output to a new text file
more GLAH14_tllz_conus_lulcfilt_demfilt.csv

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Introduction

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Exercises