getting the uniqueness from extracted grep results BUT with stream as an input












0















On finished input (like a file) we can do that:



cat file | grep -o memory=[3-9] | sort -u


But sort won't work with a stream:



tail -f server.log | grep -o memory=[3-9] | sort -u


server.log can be an infinite stream (a real time log). Above command can last hours.



how can I aggregate results adding another tool into the pipe,
or making somehow that sort will work?



OR:



what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
I am not sure if pipe will allow that, at all.



maybe the second part of pipe must be a combined one (like something doing grep+sort at once)



I am only interested with the command-line approach to that.



It could be something like watch, but updating the previous result.



On example:
Instead of seeing a plenty of lines like:



memory=4
memory=4
memory=4
memory=4
memory=2
...


I want to see just:



memory=4
memory=2


The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.










share|improve this question





























    0















    On finished input (like a file) we can do that:



    cat file | grep -o memory=[3-9] | sort -u


    But sort won't work with a stream:



    tail -f server.log | grep -o memory=[3-9] | sort -u


    server.log can be an infinite stream (a real time log). Above command can last hours.



    how can I aggregate results adding another tool into the pipe,
    or making somehow that sort will work?



    OR:



    what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
    I am not sure if pipe will allow that, at all.



    maybe the second part of pipe must be a combined one (like something doing grep+sort at once)



    I am only interested with the command-line approach to that.



    It could be something like watch, but updating the previous result.



    On example:
    Instead of seeing a plenty of lines like:



    memory=4
    memory=4
    memory=4
    memory=4
    memory=2
    ...


    I want to see just:



    memory=4
    memory=2


    The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.










    share|improve this question



























      0












      0








      0








      On finished input (like a file) we can do that:



      cat file | grep -o memory=[3-9] | sort -u


      But sort won't work with a stream:



      tail -f server.log | grep -o memory=[3-9] | sort -u


      server.log can be an infinite stream (a real time log). Above command can last hours.



      how can I aggregate results adding another tool into the pipe,
      or making somehow that sort will work?



      OR:



      what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
      I am not sure if pipe will allow that, at all.



      maybe the second part of pipe must be a combined one (like something doing grep+sort at once)



      I am only interested with the command-line approach to that.



      It could be something like watch, but updating the previous result.



      On example:
      Instead of seeing a plenty of lines like:



      memory=4
      memory=4
      memory=4
      memory=4
      memory=2
      ...


      I want to see just:



      memory=4
      memory=2


      The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.










      share|improve this question
















      On finished input (like a file) we can do that:



      cat file | grep -o memory=[3-9] | sort -u


      But sort won't work with a stream:



      tail -f server.log | grep -o memory=[3-9] | sort -u


      server.log can be an infinite stream (a real time log). Above command can last hours.



      how can I aggregate results adding another tool into the pipe,
      or making somehow that sort will work?



      OR:



      what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
      I am not sure if pipe will allow that, at all.



      maybe the second part of pipe must be a combined one (like something doing grep+sort at once)



      I am only interested with the command-line approach to that.



      It could be something like watch, but updating the previous result.



      On example:
      Instead of seeing a plenty of lines like:



      memory=4
      memory=4
      memory=4
      memory=4
      memory=2
      ...


      I want to see just:



      memory=4
      memory=2


      The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.







      command-line grep streaming pipe






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Feb 15 at 11:02







      Sławomir Lenart

















      asked Feb 15 at 10:41









      Sławomir LenartSławomir Lenart

      1113




      1113






















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          the working solution is:



          $ tail -f infinite_server.log | grep -o memory=[3-9] > output &


          then



          $ watch "cat output | sort -u"





          share|improve this answer

























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            active

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            active

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            the working solution is:



            $ tail -f infinite_server.log | grep -o memory=[3-9] > output &


            then



            $ watch "cat output | sort -u"





            share|improve this answer






























              1














              the working solution is:



              $ tail -f infinite_server.log | grep -o memory=[3-9] > output &


              then



              $ watch "cat output | sort -u"





              share|improve this answer




























                1












                1








                1







                the working solution is:



                $ tail -f infinite_server.log | grep -o memory=[3-9] > output &


                then



                $ watch "cat output | sort -u"





                share|improve this answer















                the working solution is:



                $ tail -f infinite_server.log | grep -o memory=[3-9] > output &


                then



                $ watch "cat output | sort -u"






                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Feb 15 at 11:50

























                answered Feb 15 at 11:35









                Sławomir LenartSławomir Lenart

                1113




                1113






























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