linux - 如何在多个文件中搜索字符串？如果不存在则显示文件名

Question

我有一个场景

我想在多个文件中搜索关键字

如果关键字不存在则显示文件名

需要搜索的关键字是'$$DEMO_STUDENT_NAME'

命令不起作用...

grep "$$DEMO_STUDENT_NAME" /d/demo/

Answer 1

假设 $$DEMO_STUDENT_NAME 确实是您要查找的单词，而不是拼写错误的环境变量名称，请改用它(注意单引号):

grep -vrl '$$DEMO_STUDENT_NAME' /d/demo/

或者这个:

grep -rlL '$$DEMO_STUDENT_NAME' /d/demo/

这是一个概念证明:

$ mkdir temp
$ echo 'teste' > temp/file1
$ echo 'teste' > temp/file2
$ echo 'teste' > temp/file3
$ echo 'work' > temp/file4
$ grep -vrl teste temp/
temp/file4
$ grep -rlL teste temp/
temp/file4
$ grep -V
grep (GNU grep) 2.20
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Haertel and others, see <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>.