Error #487

Hey, I am new to this today I was learning nmap but when I typed this commad ( nmap -sT -p ) it showed error #487 and said your port specifications are illegal and at the end it said QUITTING!. Can someone explain me what is it.
And I am running Kali Linux on vmare.

The command switch -p starts the specification of a port or a range of ports.

For example scan only TCP port 80:

nmap -sT -p80 localhost

For example scan all TCP ports in the range 10,11,12,…,100:

nmap -sT -p10-100 localhost

For example scan all TCP ports (implicit 0-65535):

nmap -sT -p- localhost

To see how much space you have used and free.
To see where files are taking up space.
Disk Cleanup.
System Restore.
Repair the Recycle Bin.
Repair Temporary Internet Files.
Delete Files in the System Temp Folder.
Check Size of Swap File.

Regards,
Rachel Gomez