codex-lv2-may-2025

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Exploring More `ls` Options

The ls command can be used with more than one option at a time. Options change how the output is displayed.

Steps

Try the -l option Type:
```
ls -l
```
This shows a long list format with extra details like file size, permissions, and dates.
Try -l with -h Type:
```
ls -lh
```
This shows the same list, but file sizes are shown in a readable format (like 1K, 2M, etc.).
Combine options You can write options together:
```
ls -lh
```
is the same as:
```
ls -l -h
```

Extra Challenge

List files in reverse chronological order

Try:
```
ls -lt
```
This lists files by last modified time (newest first).
Add -r to reverse the order:
```
ls -ltr
```
Now the oldest files appear first.
Add -h to make sizes easier to read:
```
ls -ltrh
```

Use this to answer:

Which file was changed last?

Look at the bottom of the list — that’s the most recently changed file when using -ltr.