Three shell scripts are added in this tutorial to generate a report.Įach bash script has written with unique features and choose the one you need.Īlso, you can modify this script based on your needs.

You can use this script to generate a CPU, memory and swap usage for a multiple Linux system. This script will help you to create a report for you. This is due to the alignment of top and provides much cleaner output: cut memory_raw -d',' -f3 | tee memory_used_withlabel.txtĬut memory_used_withlabel.txt -d' ' -f3 | tee memory_used.You have a small infrastructure and want to check multiple system performance simultaneously for some reason. As we later found out, it is much faster to leave out the cut command during data acquisition, then perform the cut command on the output file later.Īlso, we had no need for timestamps in our tests.īegin Logging: top -bd 0.1 | grep 'KiB Mem' | tee memory_raw.txtĢ levels of cut (filtering), first by comma, then by space. It does turn out that piping through cut cause MASSIVE delay in getting anything out to file. In my case I wanted to use top also because you can run memory stats faster than 1 second per capture, as you can see here I wanted to capture a stat every 1/10th of a second. The user can indeed modify the 0.1 to another number in order to run different capture sample rates. The standard output from top when grep ing with Kib Mem is: KiB Mem : 16047368 total, 8708172 free, 6015720 used, 1323476 buff/cacheīy running this through cut, we filter down to literally just the number prior to used OR: top -bd 0.1 | grep 'KiB Mem' | cut -d' ' -f10 | tee memory.txt

So here is the answer that I came up with: top -bd 0.1 | grep 'KiB Mem' | cut -d' ' -f10 > memory.txt

all will seem to output without excess filtering. So I know that I am late to this game, but I just came up with this answer, as I needed to do this, and really didn't want the extra fields that vmstat, free, etc.

Ubuntu check resource usage