【コマンドライン】ディレクトリ（フォルダ）・ファイルの複製 [ cp ]

$ ls
memo.txt
$ cat memo.txt 
Hello World!
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$ cp memo.txt tmp.txt
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$ ls
memo.txt tmp.txt
$ cat tmp.txt 
Hello World!

$ cat memo.txt 
Hello World!
$ cat sample.txt 
Good Morning!
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$ cp memo.txt sample.txt 
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$ cat sample.txt 
Hello World!

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$ cp -i memo.txt sample.txt 
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cp: `sample.txt' を上書きしますか? n
$

$ ls
sample
$ ls
sample
$ ls sample
memo.txt
$ cat sample/memo.txt 
Hello World!
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$ cp -r sample test
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$ ls
sample  test
$ ls test
memo.txt
$ cat test/memo.txt 
Hello World!