#Linux terminal process monitor how to#
#Linux terminal process monitor install#
#Linux terminal process monitor software#
#Linux terminal process monitor code#

In this case, it’s configured for 20% – in other words, if CPU usage is beyond 80%, the administrator gets an email. Then, it uses an if function to check if the idle percentage is below a certain number, and will send an email to the administrator if it is. #!/bin/bashĬPU=$(sar 1 5 | grep 'Average' | sed 's/^.* //')Įcho 'CPU usage is high!' | sendmail script uses sed to grab the average CPU idle percentage from sar. In this part of the guide, we’ll go over one possible script where CPU usage is monitored every minute, and we’ll configure it to send an email when CPU usage gets high.

#Linux terminal process monitor code#

There are a lot of different ways to code a script that monitors CPU usage. Other distributions and desktop environments should have a similar tool. This will open a window similar to Window’s task manager, where you can sort processes by their CPU usage. Ubuntu uses Gnome by default as its desktop environment, and the command to launch the system manager is: $ gnome-system-monitor If you are using a desktop client or have a GUI installed, there should be a graphical tool for monitoring system usage. It will also show the average of all 5 of its probes at the end of the output. This will make sar check the CPU usage every 2 seconds, 5 times. To make sar stop after a certain number of outputs, specify a second number. The output will look like this, and output a new line every 4 seconds: sar 4Ġ2:33:24 AM CPU %user %nice %system %iowait %steal %idleĠ2:33:25 AM all 9.09 0.00 0.00 0.00 0.00 90.91 This allows you to specify how often (in seconds) the sar command should output information about CPU utilization.įor example, to check CPU usage every 4 seconds: $ sar 4

It’s most useful when coupled with a number in the command. This shows a lot of the same information as top, but in a concise, one-time output. Once the sysstat package is installed, you will have access to the mpstat command.

#Linux terminal process monitor install#

Ubuntu and Debian: $ sudo apt-get install sysstatĬentOS and Red Hat: # yum install sysstat You will have to install this package in order to use the commands. There are a few more tools we can use to check CPU usage, and they’re contained in the sysstat package. Below that, there’s a list of running processes and a column titled %CPU, which contains the current CPU usage of each process listed. The next two lines are dedicated to memory information, and aren’t relevant for monitoring CPU usage. Example: the CPU needed to “steal” resources from a virtual machine in order to process the physical machine’s workload.

st: Percentage of CPU time that was stolen from a virtual machine.

Example: a high priority service interrupting the CPU.

#Linux terminal process monitor software#

si: Percentage of CPU time spent processing software interrupts.

Example: the network card (or any piece of hardware) interrupting the CPU to notify it that new data has arrived.

hi: Percentage of CPU time spent processing hardware interrupts.

Example: waiting for a hard drive to finish reading data.

wa: Percentage of CPU time spent on waiting on I/O from hardware.

ni: Percentage of CPU time spent on running processes with a user-defined priority (a specified nice value).

sy: Percentage of CPU time spent in kernel space (running system processes).

us: Percentage of CPU time spent in user space (running user-spawned processes).

This will open up a display in the terminal that has a live view of services running on the system, the amount of system resources each of those services are using, as well as a summary of the system’s CPU utilization, among other information.

A lot of the output from this command is rather complex, but it gives very granular information about how the CPU is being utilized on a system. $ – requires given linux commands to be executed as a regular non-privileged userĪ great way to check the current CPU usage is with the top command.

# – requires given linux commands to be executed with root privileges either directly as a root user or by use of sudo command Privileged access to your Linux system as root or via the sudo command. Requirements, Conventions or Software Version Used

#Linux terminal process monitor how to#

How to Check and Monitor CPU utilization on Linux Software Requirements and Conventions Used Software Requirements and Linux Command Line Conventions Category