Is it possible to delete the boot/startup volume from Terminal

Is it possible to delete the boot/startup volume from Terminal?
What sort of command would/could allow this?

Is it possible to delete the boot/startup volume from Terminal?
Do you mean is it possible to destroy your system from the Terminal? Anyone that has spend long enough working with Unix from a command line knows that answer. Yes! And a painful lesson it has been for many of us.
The real question is, what is your goal?
If you just want to erase lots of files, then the 'rm' command is available. Once all the files are erased, the rm command will be one of them, and so that is the end of the game. You will not be able to execute any more commands. The file system is still there, and the data in all those files is still on the disk, you have just eliminated the easy way to access that data (via file names).
If you want to initialize a new file system on the disk, you could most likely do that (diskutil - it will be the last command you run from the terminal, but you could most likely do it). Again, the data is still there, but the file system structure that held all the names and allocation information has been eliminated.
If you want to securely erase the disk, that is also possible (diskutil), and again, that will be the last command you will run from the terminal. Now nothing is left behind, neither data nor file system structure.
What sort of command would/could allow this?
rm and diskutil come to mind (in combination with sudo).
You could also just boot from the installation DVD, and then from the Menu select the Disk Utility and erase the disk as well as give it a new file system. And since you are running from the OS stored on the DVD, you can do other things after the Disk Utility is finished.

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