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 2022-12-23 2021-10-31 2022-12-23 2022-12-23 2022-12-23 2021-08-26