Grep command to show the number of results


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# 1  
Grep command to show the number of results

Hi
I wanted to know if there is an option in grep command to show the number of results (not the number of lines of findings).


Thanks
# 2  
do you mean the count of matching lines? If so, then -c option will do it. From man page on a NetBSD system:

Code:
-c, --count
              Suppress  normal output; instead print a count of matching lines
              for each input file.  With the -v,  --invert-match  option  (see
              below), count non-matching lines.

Code:
~ grep --version
grep (GNU grep) 2.5.1a nb1

# 3  
Quote:
Originally Posted by milhan
do you mean the count of matching lines? If so, then -c option will do it. From man page on a NetBSD system:
Code:
-c, --count
              Suppress  normal output; instead print a count of matching lines
              for each input file.  With the -v,  --invert-match  option  (see
              below), count non-matching lines.

Code:
~ grep --version
grep (GNU grep) 2.5.1a nb1

Hello milhan,

If you see OP's question carefully, OP needs to know total number of matched count of string NOT number of lines and as per your posted quote seems -c Option gives matched number of lines.

Take an example where a line contains a string in 5 lines but one line is having string 2 in a line then count should come 2 but this will not be the case as per man page lines you showed, though I can't test it as I am not in box as of now.

IMHO awk could be a choice for this one.

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
# 4  
Hi
maybe a pipe?
Code:
grep -o 'pattern' file | wc -l

instead of the "wc -l" command, you can use "cat -n" or "nl"

Last edited by nezabudka; 12-29-2019 at 02:42 PM..
# 5  
Number of lines? Is the -n option. According to my interpretation.
An example can clarify things...
# 6  
Some Sunday jokes
if the file is not large
Code:
sed -z 's/<pattern>/\r/g; s/[^\r]//g;s/.*/expr length &/e' file

otherwise
Code:
sed -n 's/<pattern>/\r/g; s/[^\r]//g; /\r/H; ${x;s/\n//g; s/.*/expr length &/ep}' file
sed -n 's/<pattern>/\r/g; s/[^\r]//g; /\r/H; ${x;s/\r/+1/g; s/.*/echo $((&))/ep}' file

This User Gave Thanks to nezabudka For This Post:
# 7  
Suppose you wanted to count the number of times the word of occurs in a file

Code:
Owner@Owner-PC ~
$ cat filename
all of the kings of Norway

Owner@Owner-PC ~
$ grep -Fo 'of'  filename |wc -l
2

This User Gave Thanks to jim mcnamara For This Post:
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