Use pv with find -exec












1















I use the following command to verify ~700 GiB of backed-up files:



$ find -type f -exec md5sum {} + | sort > ~/checksums


This takes many hours, so I would like to integrate pv into the command to show the progress.



I could do this:



$ find -type f -exec pv {} + | md5sum


But it concatenates all of the files, resulting in only one checksum.



So how could I include pv and still get a text file full of checksums at the end?






find checksum pv







share|improve this question





























    1















    I use the following command to verify ~700 GiB of backed-up files:



    $ find -type f -exec md5sum {} + | sort > ~/checksums


    This takes many hours, so I would like to integrate pv into the command to show the progress.



    I could do this:



    $ find -type f -exec pv {} + | md5sum


    But it concatenates all of the files, resulting in only one checksum.



    So how could I include pv and still get a text file full of checksums at the end?






    find checksum pv







    share|improve this question



























      1












      1








      1








      I use the following command to verify ~700 GiB of backed-up files:



      $ find -type f -exec md5sum {} + | sort > ~/checksums


      This takes many hours, so I would like to integrate pv into the command to show the progress.



      I could do this:



      $ find -type f -exec pv {} + | md5sum


      But it concatenates all of the files, resulting in only one checksum.



      So how could I include pv and still get a text file full of checksums at the end?






      find checksum pv







      share|improve this question
















      I use the following command to verify ~700 GiB of backed-up files:



      $ find -type f -exec md5sum {} + | sort > ~/checksums


      This takes many hours, so I would like to integrate pv into the command to show the progress.



      I could do this:



      $ find -type f -exec pv {} + | md5sum


      But it concatenates all of the files, resulting in only one checksum.



      So how could I include pv and still get a text file full of checksums at the end?






      find checksum pv




      find checksum pv






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 10 hours ago







      EmmaV

















      asked 10 hours ago









      EmmaVEmmaV

      1,1581332




      1,1581332






















          1 Answer
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          active

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          4














          Your first command should not be able to run at all as you can't use a pipe in an -exec like that (this was apparently a typo in the original question).



          Instead:



          find . -type f -exec md5sum {} + | sort -o ~/checksums


          or, with pv,



          find . -type f -exec md5sum {} + | pv | sort -o ~/checksums


          In both of the above, md5sum would be called with as many pathnames as possible in batches. sort would take the output of find (which is the output of md5sum) and sort it into the given filename. The second variation additionally inserts pv between the find and the sort.



          You can't use -exec pv {} | md5sum for individual files as the pipe would need to be embedded in a in-line shell script that you call from -exec for each file. But even the correct -exec sh -c 'pv "$1" | md5sum' sh {} ; would discard the filename from the generated md5sum output, so that can't be used either. The pv utility acts like a drop-in replacement for cat.






          share|improve this answer


























          • I wrote the first command wrong. I'll change it.

            – EmmaV
            10 hours ago











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          1 Answer
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          active

          oldest

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          4














          Your first command should not be able to run at all as you can't use a pipe in an -exec like that (this was apparently a typo in the original question).



          Instead:



          find . -type f -exec md5sum {} + | sort -o ~/checksums


          or, with pv,



          find . -type f -exec md5sum {} + | pv | sort -o ~/checksums


          In both of the above, md5sum would be called with as many pathnames as possible in batches. sort would take the output of find (which is the output of md5sum) and sort it into the given filename. The second variation additionally inserts pv between the find and the sort.



          You can't use -exec pv {} | md5sum for individual files as the pipe would need to be embedded in a in-line shell script that you call from -exec for each file. But even the correct -exec sh -c 'pv "$1" | md5sum' sh {} ; would discard the filename from the generated md5sum output, so that can't be used either. The pv utility acts like a drop-in replacement for cat.






          share|improve this answer


























          • I wrote the first command wrong. I'll change it.

            – EmmaV
            10 hours ago
















          4














          Your first command should not be able to run at all as you can't use a pipe in an -exec like that (this was apparently a typo in the original question).



          Instead:



          find . -type f -exec md5sum {} + | sort -o ~/checksums


          or, with pv,



          find . -type f -exec md5sum {} + | pv | sort -o ~/checksums


          In both of the above, md5sum would be called with as many pathnames as possible in batches. sort would take the output of find (which is the output of md5sum) and sort it into the given filename. The second variation additionally inserts pv between the find and the sort.



          You can't use -exec pv {} | md5sum for individual files as the pipe would need to be embedded in a in-line shell script that you call from -exec for each file. But even the correct -exec sh -c 'pv "$1" | md5sum' sh {} ; would discard the filename from the generated md5sum output, so that can't be used either. The pv utility acts like a drop-in replacement for cat.






          share|improve this answer


























          • I wrote the first command wrong. I'll change it.

            – EmmaV
            10 hours ago














          4












          4








          4







          Your first command should not be able to run at all as you can't use a pipe in an -exec like that (this was apparently a typo in the original question).



          Instead:



          find . -type f -exec md5sum {} + | sort -o ~/checksums


          or, with pv,



          find . -type f -exec md5sum {} + | pv | sort -o ~/checksums


          In both of the above, md5sum would be called with as many pathnames as possible in batches. sort would take the output of find (which is the output of md5sum) and sort it into the given filename. The second variation additionally inserts pv between the find and the sort.



          You can't use -exec pv {} | md5sum for individual files as the pipe would need to be embedded in a in-line shell script that you call from -exec for each file. But even the correct -exec sh -c 'pv "$1" | md5sum' sh {} ; would discard the filename from the generated md5sum output, so that can't be used either. The pv utility acts like a drop-in replacement for cat.






          share|improve this answer















          Your first command should not be able to run at all as you can't use a pipe in an -exec like that (this was apparently a typo in the original question).



          Instead:



          find . -type f -exec md5sum {} + | sort -o ~/checksums


          or, with pv,



          find . -type f -exec md5sum {} + | pv | sort -o ~/checksums


          In both of the above, md5sum would be called with as many pathnames as possible in batches. sort would take the output of find (which is the output of md5sum) and sort it into the given filename. The second variation additionally inserts pv between the find and the sort.



          You can't use -exec pv {} | md5sum for individual files as the pipe would need to be embedded in a in-line shell script that you call from -exec for each file. But even the correct -exec sh -c 'pv "$1" | md5sum' sh {} ; would discard the filename from the generated md5sum output, so that can't be used either. The pv utility acts like a drop-in replacement for cat.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 10 hours ago

























          answered 10 hours ago









          KusalanandaKusalananda

          125k16236389




          125k16236389













          • I wrote the first command wrong. I'll change it.

            – EmmaV
            10 hours ago



















          • I wrote the first command wrong. I'll change it.

            – EmmaV
            10 hours ago

















          I wrote the first command wrong. I'll change it.

          – EmmaV
          10 hours ago





          I wrote the first command wrong. I'll change it.

          – EmmaV
          10 hours ago


















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