Jupyter run Bash command without printing output












0















Is there a way to run command line commands in Jupyter without the cell output?



e.g.



!wget http://files.fast.ai/data/dogscats.zip -P ./data/


without printing the process in my cell?










share|improve this question



























    0















    Is there a way to run command line commands in Jupyter without the cell output?



    e.g.



    !wget http://files.fast.ai/data/dogscats.zip -P ./data/


    without printing the process in my cell?










    share|improve this question

























      0












      0








      0








      Is there a way to run command line commands in Jupyter without the cell output?



      e.g.



      !wget http://files.fast.ai/data/dogscats.zip -P ./data/


      without printing the process in my cell?










      share|improve this question














      Is there a way to run command line commands in Jupyter without the cell output?



      e.g.



      !wget http://files.fast.ai/data/dogscats.zip -P ./data/


      without printing the process in my cell?







      bash jupyter






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 20 '18 at 14:57









      Rutger HofsteRutger Hofste

      873816




      873816
























          1 Answer
          1






          active

          oldest

          votes


















          3














          the oldest trick works:



          !wget ... >/dev/null 2>&1


          or with --err option:



          In [1]: %%bash --err null
          ...: wget ...


          this actually stores the stderr output into the variable null.






          share|improve this answer





















          • 1





            great! to provide context: the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems.

            – Rutger Hofste
            Nov 20 '18 at 15:07











          • Why did you add 2>&1 ?

            – Rutger Hofste
            Nov 20 '18 at 15:25






          • 1





            @RutgerHofste wget outputs progress to stderr

            – georgexsh
            Nov 20 '18 at 15:31











          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html

            – georgexsh
            Nov 20 '18 at 15:52











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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          3














          the oldest trick works:



          !wget ... >/dev/null 2>&1


          or with --err option:



          In [1]: %%bash --err null
          ...: wget ...


          this actually stores the stderr output into the variable null.






          share|improve this answer





















          • 1





            great! to provide context: the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems.

            – Rutger Hofste
            Nov 20 '18 at 15:07











          • Why did you add 2>&1 ?

            – Rutger Hofste
            Nov 20 '18 at 15:25






          • 1





            @RutgerHofste wget outputs progress to stderr

            – georgexsh
            Nov 20 '18 at 15:31











          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html

            – georgexsh
            Nov 20 '18 at 15:52
















          3














          the oldest trick works:



          !wget ... >/dev/null 2>&1


          or with --err option:



          In [1]: %%bash --err null
          ...: wget ...


          this actually stores the stderr output into the variable null.






          share|improve this answer





















          • 1





            great! to provide context: the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems.

            – Rutger Hofste
            Nov 20 '18 at 15:07











          • Why did you add 2>&1 ?

            – Rutger Hofste
            Nov 20 '18 at 15:25






          • 1





            @RutgerHofste wget outputs progress to stderr

            – georgexsh
            Nov 20 '18 at 15:31











          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html

            – georgexsh
            Nov 20 '18 at 15:52














          3












          3








          3







          the oldest trick works:



          !wget ... >/dev/null 2>&1


          or with --err option:



          In [1]: %%bash --err null
          ...: wget ...


          this actually stores the stderr output into the variable null.






          share|improve this answer















          the oldest trick works:



          !wget ... >/dev/null 2>&1


          or with --err option:



          In [1]: %%bash --err null
          ...: wget ...


          this actually stores the stderr output into the variable null.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 20 '18 at 15:14

























          answered Nov 20 '18 at 15:04









          georgexshgeorgexsh

          10.2k11336




          10.2k11336








          • 1





            great! to provide context: the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems.

            – Rutger Hofste
            Nov 20 '18 at 15:07











          • Why did you add 2>&1 ?

            – Rutger Hofste
            Nov 20 '18 at 15:25






          • 1





            @RutgerHofste wget outputs progress to stderr

            – georgexsh
            Nov 20 '18 at 15:31











          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html

            – georgexsh
            Nov 20 '18 at 15:52














          • 1





            great! to provide context: the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems.

            – Rutger Hofste
            Nov 20 '18 at 15:07











          • Why did you add 2>&1 ?

            – Rutger Hofste
            Nov 20 '18 at 15:25






          • 1





            @RutgerHofste wget outputs progress to stderr

            – georgexsh
            Nov 20 '18 at 15:31











          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html

            – georgexsh
            Nov 20 '18 at 15:52








          1




          1





          great! to provide context: the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems.

          – Rutger Hofste
          Nov 20 '18 at 15:07





          great! to provide context: the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems.

          – Rutger Hofste
          Nov 20 '18 at 15:07













          Why did you add 2>&1 ?

          – Rutger Hofste
          Nov 20 '18 at 15:25





          Why did you add 2>&1 ?

          – Rutger Hofste
          Nov 20 '18 at 15:25




          1




          1





          @RutgerHofste wget outputs progress to stderr

          – georgexsh
          Nov 20 '18 at 15:31





          @RutgerHofste wget outputs progress to stderr

          – georgexsh
          Nov 20 '18 at 15:31













          @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html

          – georgexsh
          Nov 20 '18 at 15:52





          @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html

          – georgexsh
          Nov 20 '18 at 15:52


















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