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To include all subdirectories in a search, add the -r operator to the grep command. This command prints the matches for all files in the current directory, subdirectories, and the exact path with the filename.
To recursively search for a pattern, invoke grep with the -r option (or --recursive ). When this option is used grep will search through all files in the specified directory, skipping the symlinks that are encountered recursively.
To copy a directory with all subdirectories and files, use the cp command.
Options. The find command will begin looking in the starting directory you specify and proceed to search through all accessible subdirectories. You may specify more than one starting directory for searching.
If your grep supports -R, do:
grep -R 'string' dir/
If not, then use find:
find dir/ -type f -exec grep -H 'string' {} +
grep -r -e string directory
-r is for recursive; -e is optional but its argument specifies the regex to search for. Interestingly, POSIX grep is not required to support -r (or -R), but I'm practically certain that System V in practice they (almost) all do. Some versions of grep did, sogrep support -R as well as (or conceivably instead of) -r; AFAICT, it means the same thing.
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