How to get alert email for hard disk and ram utilization

[Crucificator]

Asim Ansari wrote:

>Hi Folks,
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>Running Red Hat Linux 8.0. 
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>I need to get email alert when RAM utilization on my server is above 80% and
>free disk space is 30%, I don't have any SMTP service running on this
>machine, I want to send this email through smtp server running on another
>machine in my LAN.
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> Asim
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for user in $(users); do
 cpu=$(ps h -U $user -o pcpu|paste -sd+|bc)
 [[ ${cpu/./} -gt 100 ]] && \
  echo "Fsck off, you're eating my cpu!"|mail -s "READ NOW !!!" $user
done