How do I use grep to search the current directory for all files having the a string "hello" yet display only .h and .cc files?
How do I use grep to search the current directory for any and all files containing the string "hello" and display only .h and .cc files?
grep -r --include=*.{cc,h} "hello" .
This reads: search recursively (in all sub directories also) for all .cc OR .h files that contain "hello" at this . (current) directory
From another stackoverflow question
You can pass in wildcards in instead of specifying file names or using stdin.
grep hello *.h *.cc