SCP command in linux

The syntax for the scp command is:

scp [options] [[user@]host1:]filename1 ... [[user@]host2:]filename2

For example
if user dvader is on a computer called empire.gov, and wants to copy a file called file1.txt to a directory called somedir in his account on a computer called deathstar.com, he would enter:
scp file1.txt dvader@deathstar.com:somedir

Likewise, if he wanted to copy the entire contents of the somedir directory on deathstar.com back to his empire.gov account, he would enter:
scp -r dvader@deathstar.com:somedir somedir