To do this, you must know the name of the file you want to copy, and you must create a new name to give the new file. Then you just type cp oldfilename newfilename. I then did an ls to verify that it copied. It is important to protect your files and directories against removal or alteration by yourself or others. Linux keeps track of who owns what file and who can do what to each file.
Permissions determine who can use what file or directory.
A user who has read permission for a file may look at its contents or make a copy of it. For a directory, read permission enables a user to find out what files are in that directory. A user who has write permission for a file can alter or remove the contents of that file. For a directory, a user can create and delete files in that directory. For a directory, execute permission allows a user to change into that directory.