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 at 14:57









      Rutger Hofste

      848815




      848815
























          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 at 15:07










          • Why did you add 2>&1 ?
            – Rutger Hofste
            Nov 20 at 15:25






          • 1




            @RutgerHofste wget outputs progress to stderr
            – georgexsh
            Nov 20 at 15:31










          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html
            – georgexsh
            Nov 20 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 at 15:07










          • Why did you add 2>&1 ?
            – Rutger Hofste
            Nov 20 at 15:25






          • 1




            @RutgerHofste wget outputs progress to stderr
            – georgexsh
            Nov 20 at 15:31










          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html
            – georgexsh
            Nov 20 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 at 15:07










          • Why did you add 2>&1 ?
            – Rutger Hofste
            Nov 20 at 15:25






          • 1




            @RutgerHofste wget outputs progress to stderr
            – georgexsh
            Nov 20 at 15:31










          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html
            – georgexsh
            Nov 20 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 at 15:14

























          answered Nov 20 at 15:04









          georgexsh

          10.1k11136




          10.1k11136








          • 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 at 15:07










          • Why did you add 2>&1 ?
            – Rutger Hofste
            Nov 20 at 15:25






          • 1




            @RutgerHofste wget outputs progress to stderr
            – georgexsh
            Nov 20 at 15:31










          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html
            – georgexsh
            Nov 20 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 at 15:07










          • Why did you add 2>&1 ?
            – Rutger Hofste
            Nov 20 at 15:25






          • 1




            @RutgerHofste wget outputs progress to stderr
            – georgexsh
            Nov 20 at 15:31










          • @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html
            – georgexsh
            Nov 20 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 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 at 15:07












          Why did you add 2>&1 ?
          – Rutger Hofste
          Nov 20 at 15:25




          Why did you add 2>&1 ?
          – Rutger Hofste
          Nov 20 at 15:25




          1




          1




          @RutgerHofste wget outputs progress to stderr
          – georgexsh
          Nov 20 at 15:31




          @RutgerHofste wget outputs progress to stderr
          – georgexsh
          Nov 20 at 15:31












          @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html
          – georgexsh
          Nov 20 at 15:52




          @RutgerHofste see this tldp.org/LDP/abs/html/io-redirection.html
          – georgexsh
          Nov 20 at 15:52


















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