. # 任意の一文字 * # 直前の文字が任意の個数続く文字列(0個も含む) <space><space>* # 連続するSPACEを表す <tab> # TAB .* # 任意の文字列 sed -e "s/aaaa/bbbb/" # 置換 行で最初に出てきた'aaaa'を'bbbb'に置換 sed -e "s/aaaa/bbbb/g" # 入力の全行に渡って置換 (Global) sed -e "s/^aaaa/bbbb/" # 行頭(^)に'aaaa'のもの sed -e "s/aaaa\$/bbbb/" # 行末($)に'aaaa'のもの。$は\でescape sed -e "s/~/bbbb/" # 行頭に'bbbb'を追加 sed -e "s/\$/bbbb/" # 行末に'bbbb'を追加 sed -e "s/.*/abcd/" # すべての行を'abcd'に置換 sed -e
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