How to setup smart search via egrep?

Question

linux

Hello. There is a configured search, I want to modernize it, this is how it looks now

egrep -c -i -U "dev"

I have a script in which a check is run from time to time, if there is such a name, then the script considers it to be correct and continues to work. And you need to do the opposite, so that the script checks if, for example, there is a name master , if it is not there, then it continues to work, and if there is, then let it stop. Tell me how this can be done.

Answer 1

egrep -c -i -U "dev" || echo "гре ничего не нашел и вернул статус фейл"

another option
grep -q -ciU - returns status 0 if the search is successful.