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How to display only the first 5 running process using top in shell scripting?

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Top Forums UNIX for Beginners Questions & Answers How to display only the first 5 running process using top in shell scripting?
# 8  
Old 11-22-2016
I suppose one should also ask which way you want to sort your processes. Is it by CPU use at that instant, total CPU use since process start, real memory, virtual memory, IO read, IO writes, file opens, network traffic, is the server using swap heavily etc.

There are many things to consider when a server, application or process is running slowly which may not be a simple "who is using the most CPU?"

Some examples are:
  • if your code is frequently spawning new processes to perform a menial task (e.g. using echo $var | cut -f1 -d " " in a loop)
  • if your code repeatedly opens a file to read one item in a loop rather than opening the file as input to the loop
  • if your code appends single lines to a file in a loop rather than having one output file descriptor for the loop
  • and many other pitfalls I'm sure.

Is there a particular problem you are having that you need to find out why it's running slow? Some more general information about your server, application and your perceived problem may help us to work on a better answer.



Kind regards,
Robin
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