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Another approach (thanks to Archemar + kos for avoiding use of deprecated egrep and using -c)
egrep
-c
egrepgrep -cE '^.{28}04' data1.txt | wc -l
Another approach
egrep '^.{28}04' data1.txt | wc -l
grep -cE '^.{28}04' data1.txt
