Command: cp
Arguments: [-r] <file1> <file2> | <file> <directory>

This command copies <file1> to <file2> if both arguments are files.

The second version copies <file> to the directory <directory> with same
name as <file> had before.

The option -r is not supported yet, but will/might be in the future.

The tilde (~) can be used as usual. See manual of ls for further details.

See also: w/mv, w/ls, w/ed, w/rm, w/cat, w/grep