grep count matches code example

Example 1: grep 2 matches or

Just use one of following forms with grep or egrep commands :)
grep "PATTERN1\|PATTERN2" FILE
grep -E "PATTERN1|PATTERN2" FILE
grep -e PATTERN1 -e PATTERN2 FILE
egrep "PATTERN1|PATTERN2" FILE

Example 2: grep count lines

grep -c ^ filename

Example 3: grep ocurrences

Just use flag -m to define number of occurrences to match:
grep -m1 pattern file

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