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- Both cp and rm have a -r (recursive) option that is used when operating on directories.
- mkdir and rm also have a has -f (force) option that does not report an error if the file , directory, or or directory doesn't exist.
- mkdir has a -p (parent) option that does not report an error if a component of a directory path, doesn't exist.
- It is a good idea to specify directory names with a trailing slash ( / ) to indicate that they are directories
- The "./" syntax means "relative to the current directory". It's optional but explicit.
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