# Progressive fillable Bash notebook

## Type a shell command that changes the working directory to the home directory

```bash
cd        ## ANSWER
```

## Type a shell command that lists all files in the working directory with extension .py

```bash
ls *.py   ## ANSWER
```

## Type a shell command that searches for the string "ABC" in all python files

```bash
grep ABC *.py   ## ANSWER
```

