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Asked: 2017-08-23 03:06:38 +0800 CST

Getting a tidy print from top

  • 772
 PID                                   %CPU %MEM            COMMAND                                                           
 719011 ----      --   0  ----  --- ---- -  0.7  1.3 606:58.25 dvaudio_server                                                                                   
 719012 ----      --   0  ----  --- ---- -  0.7  1.3 606:58.25 dvaudio_server                                                                                   
 719013 ----      --   0  ----  --- ---- -  0.7  1.3 606:58.25 dvaudio_server                                                                                   
 719014 ----      --   0  ----  --- ---- -  0.7  1.3 606:58.25 dvaudio_server                                                                                   
 719015 ----      --   0  ----  --- ---- -  0.7  1.3 606:58.25 dvaudio_server                                                                                   
 719016 ----      --   0  ----  --- ---- -  0.7  1.3 606:58.25 dvaudio_server

Is it possible to achieve the above result from top just by issuing an accumulation of commands piped together then saving to a file?

I have tried various ways but all give messy results.

Is there anyway of getting this information only using the pPID? This will then save having to write every child-PID in the command!

command-line

1 Answers

  1. Best Answer

    TLDR

    top -b -n1 | sed '1,6d'

    Long answer

    You could use the -b option of top :

      -b : Batch mode operation
        Starts top in 'Batch mode', which could be useful for 
        sending output from  top  to other programs  or  to  
        a file.  In this mode, top will not accept input and runs
        until the iterations limit you've set with the '-n' 
        command-line option  or  until killed.

    This basically makes top non-interactive. You can then pipe any command as you wish, and redirect the output to a file of your choice.

    As said in the man, you may want to use the -n option in order to not to have to kill the process. If you want the process to stop as soon as it shows the result, use the -n 1 value.

    sed -'1,6d' will get rid of the ressources usage summary (the first 6 lines of the output).

    Edit

    Possible duplicate of get top output for non interactive shell.

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