rgrep
Recursively find patterns in files using regular expressions. Equivalent to grep -r. More information: <https://www.gnu.org/software/grep/manual/grep.html>.
RUN apt-get update && \
apt-get install -y grep
RUN apt-get update && \
apt-get install -y grep
RUN apk add grep
RUN pacman -S --noconfirm grep
RUN apt-get update && \
apt-get install -y grep
RUN yum install -y grep
RUN dnf install -y grep
RUN apt-get update && \
apt-get install -y grep