1 sed -n 's/featuredImage/cover/p' content/posts/*.md 替换第一个 1 sed -i 's/cover:/cover:/' content/posts/*.md 全部替换 1 sed -i 's/featuredImage/cover/g' content/posts/*.md 删除所有包含单词 jtp 的行 1 cat msg.txt | sed '/jtp/d' 删除第 N 行 1 sed -i 'Nd' msg.txt