Sar command to monitor network traffic on eth0 along with CPU utilization for 48 hours

A couple of things.

1.) eth0 isn't an option for -n. You can use ALL or a number of other items, look at man sar for a list. -n ALL, would output all network stats.

2.) -e 48:00:00, this will never work, -e signifies the ending time, there is no 48:00:00 o'clock. 23:59:59 is the highest you can get.

3.) %util is only a field displayed by -d. not an option.

so you're actually looking for something like sar -d -n ALL. The only way I'm aware of getting a specific 48 hours would be to look at each file that encompasses that time period, and use -s and the starting time in 24 hour notation, and -e for the ending time in 24 hour notation. You'd have to do it one file at a time though.

For instance, if i wanted 09:00 on 3/1/2013 through 09:00 3/3/2013. I'd need to use the file for 3/1/2013 and -s 09:00:00, and then get all data for the file for 3/2, and an ending time of -e 09:00:00 for 3/3.