The iostat command in Linux allows users to monitor system i/o statistics on the device. It is based on how long the devices are operating at the average baud rate to monitor the input/output of the system. Based on reports, system configurations can be changed to optimize CPU performance. This command is in the sysstat package.
Here at LinuxAPT, we shall look into how to use the iostat command in Linux.
iostat is a part of 'sysstat' package, we can install it on our system using the following command.
In CentOS/RedHat:
# yum install sysstat -y
On Ubuntu/Debian:
$ sudo apt-get install sysstat -y
On Fedora:
# dnf install sysstat -y
To display monitoring reports, run the below command:
$ iostat
In the output, you will see the CPU report and Device report.
1. CPU:
2. Device:
It is given below:
$ iostat [option] [device-name]
iostat command option:
1. -c: displaying summary of monitoring reports:
$ iostat -c
2. -d: displaying I/O devices report only:
$ iostat -d
3. -x: displaying the detailed report:
$ iostat -x
4. -m: displaying reports in MegaBytes:
$ iostat -m
5. -k: displaying reports in kiloBytes:
$ iostat -k
6. -p: displaying device block report:
$ iostat -p
This article covers how to use the iostat command in Linux. In fact, iostat command is used to monitor CPU utilization and I/O (input /output) statistics of all the disks and file systems. nfsiostat command is used to monitor i/o statistics of network file system(NFS).
iostat command generally generates two reports:
To generate the reports, iostat command reads some of the system files . These files are: