How do I find files that do not contain a given string pattern?

Question

How do I find out the files in the current directory which do not contain the word foo (using grep)?

Answer 1

My grep does not have any -L option. I do find workaround to achieve this.

The ideas are :

1. to dump all the file name containing the deserved string to a txt1.txt.
2. dump all the file name in the directory to a txt2.txt.

3. make the difference between the 2 dump file with diff command.

   grep 'foo' *.log | cut -c1-14 | uniq > txt1.txt
   grep * *.log | cut -c1-14 | uniq > txt2.txt
   diff txt1.txt txt2.txt | grep ">"