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

Solution 1:

This works for multiple occurrences per line:

grep -o string * | wc -l

cat * | grep -c string

grep -oh string * | wc -w

will count multiple occurrences in a line

Instead of using -c, just pipe it to wc -l.

grep string * | wc -l

This will list each occurrence on a single line and then count the number of lines.

This will miss instances where the string occurs 2+ times on one line, though.