Search Results

An empty line when using -f means that one of the patterns that it tries is the empty string and that is always a positive hit, i.e. it matches everything...
$ printf "%s\n" aa bbbb ccc | grep ''...

Well, is it possible that all lines are correctly selected, i.e. are represented in the VI file? I recommend to do some intermediate steps, e.g. 20 and then 50 entries in VI.

Since we are reading the same file twice, the test for ($1 in A) is superfluous:
awk -F, 'FNR==NR{A[$1]++; next}{print $0 FS A[$1]}' file file

Simply add an And condition for print.
A commented multi-liner
awk -F, '
# first file read (NR equals FNR)
# store the number of $1 occurrences in A[ ]
(FNR==NR) { A[$1]++; next }
# second file...

What be your OS and awk version?



And, you NEED to repeat the identical input file as the program does two iterations on it. To produce an output file, use shell redirection.

Can be done with a small adation to your other thread (https://www.unix.com/unix-for-beginners-questions-and-answers/269747-extract-lines-have-dupliucate-count-them.html)'s solution
awk -F,...

Hello is2_Egypt,

Welcome to forums, regarding your question, as per your expected output, could you please try following and let me know if this helps.

awk -F, 'FNR==NR{A[$1]++;next} ($1 in...