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【めも】ファイルが存在するときのシンボリックリンク作成

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ln -s .bashrc ~/.bashrc

$ ln -s .bashrc ~/.bashrc
ln: シンボリックリンク `~/.bashrc' の作成に失敗しました: ファイルが存在します

dotfilesをgithubで管理したいなと思い、
install.shを作成しようとしたところ、
ファイルが存在する時
(Ubuntuなどのインストール直後から.bashrc
がある時)
にどんな挙動になるのかと思い試してみたところ、
案の定エラーが出るんですね。

現状色んな環境で作業することがあるので、
条件分岐つけないとまずそうですね。
ちょっとずつ書いていこうと思います。

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