Copying files is similar to moving them but you use cp instead of mv.
Watch out! If you move a file and there already exists a file
with your newfilename, that file will be destroyed. If you
do not like this feature put the line
in your .cshrc file.
To remove a file you rm filename. On UNIX systems with shared file systems once you remove it it is gone. If you don't like this you can create a safer alias as instructed below. There are also regular backups made of files, but an ounce of prevention is worth a pound of cure.