The iostat command in Linux is used to report CPU statistics and input/output statistics for devices and partitions. It can be used to monitor and analyze disk usage and performance. Here are some examples of how the command can be used:
- To display the average CPU utilization and disk usage statistics since the system was last booted, simply type
iostatand press enter:
$ iostat
Linux 4.15.0-114-generic (jdoe-linux) 07/25/2023 _x86_64_ (8 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
5.67 0.00 3.33 0.33 0.00 90.67
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sda 0.00 0.00 0.00 0 0
sdb 0.00 0.00 0.00 0 0
- To display the average CPU utilization and disk usage statistics for the last 10 seconds with interval of 2 seconds
$ iostat -t 2 10
Linux 4.15.0-114-generic (jdoe-linux) 07/25/2023 _x86_64_ (8 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
5.67 0.00 3.33 0.33 0.00 90.67
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sda 0.00 0.00 0.00 0 0
sdb 0.00 0.00 0.00 0 0
- To display the statistics of all the partitions present, use -d option
$ iostat -d
Linux 4.15.0-114-generic (jdoe-linux) 07/25/2023 _x86_64_ (8 CPU)
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sda 0.00 0.00 0.00 0 0
sdb 0.00 0.00 0.00 0 0
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
These are just a few examples of how the iostat command can be used in
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