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?

linux bash unix grep

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

linux bash unix grep

You can pass in wildcards in instead of specifying file names or using stdin.

grep hello *.h *.cc

linux bash unix grep

find . -name \*.cc -print0 -or -name \*.h -print0 | xargs -0 grep "hello".

Check the manual pages for find and xargs for details.

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