How does the 'ncal' command in Linux display a calendar?

The ncal command in Linux displays a calendar in a terminal window. By default, it shows the current month's calendar. You can use various options to customize its output. Here are some common usages:

Display the current month's calendar:
```
ncal
```
Display a specific month and year:
```
ncal 10 2023
```
This command will display the calendar for October 2023.
Display the entire year:
```
ncal -y
```
This will show the calendar for the current year.
Display the calendar with the week starting on Sunday:
```
ncal -S
```
Display the calendar in a more traditional format:
```
ncal -m
```

You can combine options as needed to customize the output further. For more details, you can check the manual page by running:

man ncal