Count all occurrences of a string in lots of files with grep

Question

I have a bunch of log files. I need to find out how many times a string occurs in all files.

grep -c string *

returns

...
f         


        

Answer 1

You can use a simple grep to capture the number of occurrences effectively. I will use the -i option to make sure STRING/StrING/string get captured properly.

Command line that gives the files' name:

grep -oci string * | grep -v :0

Command line that removes the file names and prints 0 if there is a file without occurrences:

grep -ochi string *