我有一个名为的文件textfile
,其内容为:
420_DA6_AB_ClassExercise1_2018.docx
420_DA6_AB_ClassExercise2_2018.docx
A Newbies Initiation To Linux.pdf
Exercises UNIX Chapter 1.pdf
Linux Handout 2018 - Chapter 1.pdf
Linux Handout 2018 - Chapter 2.pdf
Linux Handout 2018 - Chapter 3.pdf
Linux Handout 2018 - Chapter 4.pdf
Linux Handout 2018 - Chapter 5.pdf
Linux Handout 2018 - Chapter 6.pdf
SSHSecureShellClient-3.2.9.exe
我如何搜索其中没有数字的行?