codex-lv2-may-2025

1 | 2 | Current Level: 3 | 4 | 5

Moving with Relative and Absolute Paths

Return to exercise-data in one step Instead of doing three commands:

cd Desktop
cd shell-lesson-data
cd exercise-data

You can just type:

cd Desktop/shell-lesson-data/exercise-data

Check your location Type:

pwd

Example output:

/Users/nelle/Desktop/shell-lesson-data/exercise-data

Then list contents:

ls -F

What if we want to go back up one level? You already know:
```
cd ..
```
Use an absolute path Instead of using a relative path (from where you are), you can jump to a folder using its full location from the root:
```
cd /Users/nelle/Desktop/shell-lesson-data
```
This always works — no matter where you are in the system.
How to find the absolute path Use:
```
pwd
```
Then copy part of the result. For example, if you’re inside exercise-data, pwd might show:
```
/Users/nelle/Desktop/shell-lesson-data/exercise-data
```
You can remove the last part to get the full path to shell-lesson-data.

Relative path: starts from where you are now Example:
```
cd Desktop/shell-lesson-data
```
Absolute path: starts with / and always points to the same location Example:
```
cd /Users/nelle/Desktop/shell-lesson-data
```
Use pwd to find out where you are.
Use ls -F to check what’s in a folder after moving.

If your current location is:

/Users/backup

And you want to list folders in reverse order, like this:

pnas_sub/  pnas_final/  original/

Which command would give this output?

Choices:

Answer: