shell CPU
1. shell CPU 使用率
CPU.sh```bash MAX=95 EMAIL=server@127.0.0.1
USE=$(grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage ""}')
USE=printf "%.0f\n" $USE
if [[ $USE -gt $MAX ]]; then
echo "Percent used: $USE" | mail -s "Running out of CPU power" $EMAIL
else
echo "all is well !"
fi
执行：
```bash
$ bash CPU.sh
all is well !
2. CPU 检查
#!/bin/bash
#################################################################################
# ActiveXperts Network Monitor - Shell script checks
#
# For more information about ActiveXperts Network Monitor and SSH, please
# visit the online ActiveXperts Network Monitor Shell Script Guidelines at:
# https://www.activexperts.com/support/network-monitor/online/linux/
#################################################################################
# Script
# cpu.sh
# Description
# Checks CPU usage on the computer.
# Declare Parameters
# 1) nMaxCpuUsage (number) - maximum allowed CPU usage (%)
# Usage
# cpu.sh nMaxCpuUsage
# Sample
# cpu.sh 70
#################################################################################
nMaxCpuUsage=$1
# Validate number of arguments
if [ $# -ne 1 ] ; then
echo "UNCERTAIN: Invalid number of arguments - Usage: cpu nMaxCpuUsage"
exit 1
fi
# Validate numeric parameter nMaxCpuUsage
regExpNumber='^[0-9]+$'
if ! [[ $1 =~ $regExpNumber ]] ; then
echo "UNCERTAIN: Invalid argument: nMaxCpuUsage (number expected)"
exit 1
fi
# Check the CPU usage
nCpuLoadPercentage=`ps -A -o pcpu | tail -n+2 | paste -sd+ | bc`
nCpuLoadPercentage=$( echo "$nCpuLoadPercentage / 1" | bc )
if [ $nCpuLoadPercentage -le $nMaxCpuUsage ] ; then
echo "SUCCESS: CPU usage is [$nCpuLoadPercentage%], minimum allowed=[$1%] DATA:$nCpuLoadPercentage"
else
echo "ERROR: CPU usage is [$nCpuLoadPercentage%], minimum allowed=[$1%] DATA:$nCpuLoadPercentage"
fi
exit 0
执行：
$ bash nmaxcpu.sh 70
SUCCESS: CPU usage is [0%], minimum allowed=[70%] DATA:0
$ bash nmaxcpu.sh 80
SUCCESS: CPU usage is [0%], minimum allowed=[80%] DATA:0
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