sar: The System Activity Reporter
sar is another UNIX command for gathering information about activities on your system. You can gather data over an extended time period with sar and later produce reports based on the data. sar is similar among UNIX variants in that the options and outputs are similar. The Linux system I was using for the examples did not support sar, but the Solaris, HP-UX, and AIX systems had the same options and nearly identical outputs. The following are some useful options to sar, along with examples of reports produced with these options where applicable:
| sar -o | Saves data in a file specified by “o.” After the file name, you would usually also enter the time interval for samples and the number of samples. The following example ... |
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