sar
SafeHistorical performance (sar)
sar -u 1 5
The standard way to look *back* at performance — answer 'why was it slow last night?' with sar -f.
Examples
sar -u -f /var/log/sa/sa10CPU history for the 10th
Syntax
sar [-u|-r|-d|-n DEV] [interval count] [-f file]
Before you run it
Read only.
Related commands
The same reference, with no signal at all
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