Question

UNIX?LINUX course.

You are working on a documentation file userNotes.txt with some members of your software development team. Just before the file needs to be submitted, you manager tells you that a company standard requires that one blank space be left between the end-of-sentence period (.) and the start of the next sentence. (This rule does not affect sentences at the very end of a line.) For example, this is OK: Turn the knob. Push the “on” button. This is not: Turn the knob. Push the “on” button. Asking around among your team members, you discover that some of them have already typed their sentences in the approved manner, but others have inserted two or even more blanks between sentences. You need to fix this fast, and the first thing you want to do is to find out how bad the problem is. What command would you give to list all lines of userNotes.txt that contain sentence endings with two or more blanks before the start of the next sentence?

ANSWER SHOULD BE A GREP COMMAND WITH NO FLAGS.

I have tried (grep '. +' userNotes.txt ) but it does not work.

Answer 1

To get solution for this query, we are assuming the line is ending with alphanumeric character(either alphabet or digits) and using grep without any flags

Space in regex is represented as [ ], \\s

We are taking \\s and taking count as more than 2(sentance that ends with more than 2 spaces and period(.)

With below command in first block[], We took uppercase,lowercase alphabets and digits using the regex

-) [a-zA-Z0-9]

-) Followed by \\s counting more than 2

\\s\{2,\}

-) Period is represented by .

-) End of the sentance is represented by $

grep "[a-zA-Z0-9]\\s\{2,\}.$" testing.txt

testing.txt content

Output using above command

hello this isl. this is the way . not the things you carry but you need to worry. life is like that9 . but no matter what. JKSDFUSHDFGJ kjsdhfuiwhsfekwenkudfg akljdiujadbfusadf . hsdygfmqwjdfgi ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܐ ܕ "testing.txt" (readonly) 10L, 218C

codebuzz > grep "[a-zA-Z0-9]\\s\{2, 1}.$" testing.txt not the things you carry JKSDFUSHDFGJ kjsdhfuiwhsfekwenkudfg

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