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来自「linux下查看系统工具原码,如IOSTAT等」· 代码 · 共 9 行

The sa2 shell script creates daily reports, saved in /var/log/sa directory
(default location).
It also removes daily data files and reports which are older than a number
of days. This number defaults to 7 (one week of data history).
Answer here the number of days during which a daily data file or a report
should be kept.