1.eval sed ’s/$a/$b/’ filename2.sed "s/$a/$b/" filename3.sed ’s/’$a’/’$b’/’ filename 4.sed s/$a/$b/ filename 相关文章: 2022-12-23 2022-12-23 2021-08-24 2021-09-10 2021-12-21 2022-01-18 2022-12-23 2022-12-23