Shell Programming and Scripting

grep "StringA" server.log | wc -l
grep "StringB" server.log | wc -l
grep "StringC" server.log | wc -l

cat junaid_subhani.log

StringA and StringB and StringC counts as none
StringA and StringB counts as two times
StringB and StringA counts as two times
StringA alone counts as one time
StringB and StringC counts as none
StringB alone counts as one time
StringC alone counts as one time
StringC and StringB counts as none

awk '
/StringA/ { a++ }
/StringB/ { b++ }
/StringC/ { c++ }
END {
  print a+0
  print b+0
  print c+0
}
' server.log