#find ./ -type f -print | xargs sed -i '' -e 's//<title>生命の起源 /g' find ./ -type f -print | xargs sed -i '' -e "s/<\/head>/<meta name=\'keywords\' content=\'生命の起源,進化,自己組織化,細胞,システム生物学,origins of life, evolution, self-organization, systems biology\'><\/head>/g"