Created
February 1, 2015 09:00
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先頭の行に任意の文字列を追加するコマンド
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| sed -i '' '1s/^/test0/' test.txt |
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元ファイル
test.txt
test1
test2
コマンド入力後
test.txt
test0test1
test2
※phpでは\nを入れると改行できる