single line script to check if the CPU usage is above a certain threshhold on the device. and return exit code 0 if not, 1 if it is.

check_cpu_above_threshold_one_line_status_script.sh

cpu_threshhold=80 ; cpu_idle=$(top -b -n 1 | grep Cpu | awk '{print $8}'|cut -f 1 -d '.') ; cpu_usage=$(expr 100 - $cpu_idle) ; if [ $cpu_usage -gt $cpu_threshhold ]; then exit 1; else exit 0; fi

check_cpu_above_threshold_one_line_status_subshell.sh

cpu_threshhold=80 ; cpu_idle=$(top -b -n 1 | grep Cpu | awk '{print $8}'|cut -f 1 -d '.') ; cpu_usage=$(expr 100 - $cpu_idle) ; /bin/sh -c "echo $cpu_usage ; if [ $cpu_usage -gt $cpu_threshhold ]; then exit 1 ; else exit 0; fi"

thanks to: https://fedingo.com/shell-script-to-get-cpu-and-memory-utilization/ for inspiration