How to search for text in a bunch of files?

Question

linux

To search for text, I always used the command.
[category]# grep -r "Текст, который ищем" .
But something is not looking for Russian words from me.
Is it tech and should it be or do I have a jamb somewhere?

Answer 1

Try composing a less strict regexp
AND enable perl mode

cat > ./russian.txt
вася
петя
маша
даша

grep -P "вася|маша" ./russian.txt 
вася
маша