clock seconds 取一个整型值 用命令可以格式化时间 clock format 时间变量 -format 参数 参数可以为： %% Insert a %. %a Abbreviated weekday name (Mon, Tue, etc.). %A Full weekday name (Monday, Tuesday, etc.). %b Abbreviated month name (Jan, Feb, etc.). %B Full month name. %c Locale specific date and time. %d Day of month (01 – 31). %H Hour in
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