Cisco Headend System Release 2.7 安装指南
Chapter 4 SR i4.2.2 Post Upgrade Procedures
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10 Type date again and press Enter. Verify that the correct time now appears.
11 Type /sbin/clock -r and press Enter. The time on the hardware clock appears.
11 Type /sbin/clock -r and press Enter. The time on the hardware clock appears.