コマンドのお勉強

今日のコマンド :)

[ diff ]

diff -r 元のファイル（ディレクトリ）　新しいファイル（ディレクトリ）　>　差分ファイル

   -r :　サブディレクトリも含めて比較

[ uniq ], [ sort ]

$ cat happybirthday.txt

Happy Birthday to You!

Happy Birthday to You!

Happy Birthday Dear Tux!

Happy Birthday to You!

$ sort happybirthday.txt

Happy Birthday Dear Tux!

Happy Birthday to You!

Happy Birthday to You!

Happy Birthday to You!

$ sort happybirthday.txt | uniq

Happy Birthday Dear Tux!

Happy Birthday to You!