SYS: Produce and deliver reports on system utilization (processor, memory, disk, and network).

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Install the sysstat package if it’s not already the case:

# yum install -y sysstat

Activate the sysstat service at boot:

# chkconfig sysstat on

Produce a report for a given day (here the 11th) (-u for CPU usage, -r for memory usage, -dp for disk activity, -n DEV for network activity):

# sadf -d /var/log/sa/sa11 -- -u -r -dp -n DEV
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