shell script to monitor cpu and memory usage in linux

To get the top 5 processes (sorted by cpu usage), you can use the following command (source: ): ps aux | sort -nrk 3,3 | head -n 5Īnd now you can combine the monitoring plugin and the process output: /usr/lib/nagios/plugins/check_cpu_stats. I also need to get the start commands and process names of the top 5 process Example: /usr/lib/nagios/plugins/check_cpu_stats.sh -w 70,70,70 -c 80,80,80 > /dev/null if ] then echo 'alert' | mailx -s 'cpu alert' else echo 'no alert' fi But you can also use the plugin standalone and send an alert. You can of course also adapt the thresholds to your environment.Ĭoncerning the alerting part: The best scenario is of course, if you already have this host/machine in an existing monitoring. Critical thresholds are set to 80% CPU usage on user, system and iowait. Warning thresholds are set to 70% CPU usage on user, system and iowait. There are a couple of different versions of this plugin out there, one example can be found here: The plugin check_cpu_stats supports thresholds on CPU usage (not load). I suggest you use an already existing monitoring plugin for this purpose. Read-Host 'Press any key to continue.I need to send an email whenever the CPU utilization goes beyond 70%? Get-WmiObject Win32_LogicalDisk -filter 'DriveType=3 ' -computer $computer | Select DeviceID ,VolumeName, Name = 'Size(GB) ' Expression = Write-Host 'Free memory: ' $FreeMemoryinMb 'MB ' Write-Host 'Memory Use: ' $MemoryUsed 'MB ' Write-Host 'Total Memory: ' $TotalMemoryinMb 'MB ' This only prints the disk name and the space used by that disk. chmod 777 DiskUsageScript.sh Output: If the input is 1. Write-Host 'CPU usage: ' $ComputerCpu '% ' Command chmod is used to give this kind of permissions, the 777 option stands for rwx (ReadWriteExecutable).

$TotalMemoryinMb = ::truncate( $TotalMemory / 1024) $FreeMemoryinMb = ::truncate( $FreeMemory / 1024) $OperatingSystem = Get-WmiObject win32_OperatingSystem -computer $computer # Lets create a re-usable WMI method for memory stats $ProcessorStats = Get-WmiObject win32_processor -computer $computer # Lets create a re-usable WMI method for CPU stats #this script shows the cpu,ram,disk usage

Shell script to monitor cpu and memory usage in linux