tools historical network bandwidth, cpu, disk io, disk usage for ubuntu dapper server.

[Hemant Bist]

Hi,
I want to view how my ubuntu server is using the CPU, network io, cpu, disk
io, disk usage over a period of time (from last one hour to may be last one
month).
Are there any tools/utilities I can use?
I am only familiar with saidar that lets me see these values real time only.
Would appreciate any pointers for this.

Thanx,
Hemant
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