# Week 4 overview
## Learning objectives:
1. Review: grep, output redirect and appending
1. Creating and editing text files
1. Introduction to shell scripting

## Final project planning:
1. [Choose your case](https://forms.gle/5Gqcownorph3gjzcA)

### Tue. Feb. 11 activities:
1. Go to your atm350 directory and create a new directory named 250211
1. change into the /data1/surface/sao directory
1. list the contents of  that directory
1. View the contents of the 25021118_sao.wmo file
1. Search all files in that directory from 250211 that contain the string *TSSN*
1. As above, but redirect the output of the results of that command to a file named `cantore_loves_this.txt` in your /spare11/atm350/\<netid\>/250211 directory
1. Search all files in the /data1/surface/sao directory from Feb 08 that have that same string
1. As above, but append the output to your `cantore_loves_this.txt` file
1. cd to your 250211 directory
1. Edit `cantore_loves_this.txt` and add a descriptive line to the top of that file
1. Create a text file
1. Add to the file the following lines:
```
#!/bin/sh
echo "This is my first bash script" 
cp /data1/forecasts/250218.disc .
# Get number of lines containing the string "snow"
grep -c snow 250218.disc
# Get number of actual instances of the word "snow"
grep -cow snow 250218.disc
# Copy some local storm reports
cp /spare11/atm350/common/feb11/* .
echo "End of script!"
exit 0

```
13. Save the file as `myscript.sh`.
14. Try to execute the script: type `./myscript.sh`
15. `chmod +x myscript.sh`
16. Try again to execute the script: type `./myscript.sh`

## HW1
[Homework 1](https://docs.google.com/document/d/1_sWaYja7ahNF7KrF7ovIY68z946mc3QxEs60RPGdnI4/edit?usp=sharing): Due Tue, 2/18, 3PM

### Thu. Feb. 13 activities:
1. In your atm350 directory, create a `250213` directory and `cd` into that directory
1. `cp /spare11/atm350/common/feb13/* .`
1. HW 1 comments and questions
1. [IA State Local Storm Report Archive](https://mesonet.agron.iastate.edu/lsr/)
1. Download a geojson file from Jupyterlab
1. Visualize the geojson file on https://geojson.io
1. [Iowa State Mesonet Text Product Archive Documentation](https://mesonet.agron.iastate.edu/cgi-bin/afos/retrieve.py?help)
1. Interactive retrieval of text products ... e.g. `wget "https://mesonet.agron.iastate.edu/cgi-bin/afos/retrieve.py?pil=AFDALY"`
1. Redirect output of wget
1. IA State product retrieval using a shell script
1. Expand utility and flexibility of the data retrieval shell scripts