Which command allows you to copy files in a Linux environment?

In a Linux environment, the command that allows you to copy files is "cp." This command is specifically designed for duplicating files and directories from one location to another. When using "cp," you can specify various options, such as preserving file attributes or recursively copying directories, making it a versatile tool for file management.

The "mv" command, while it does deal with files, is primarily used for moving files or renaming them rather than copying. The "rm" command is for removing or deleting files, and "ls" is used to list files and directories in the current directory. Hence, "cp" is the correct and appropriate command for copying files in a Linux system.