“who -u”的输出中“旧”是什么意思？

Question

在 的列表中who -u，一些记录在空闲时间列中显示字符串“old”。我知道 ”。” 表示会话不是空闲的。“老”是什么意思？

Answer 1

尝试info coreutils 'who invocation'：

`-u'
     After the login time, print the number of hours and minutes that
     the user has been idle.  `.' means the user was active in the last
     minute.  `old' means the user has been idle for more than 24 hours.

GNU工具的信息文档通常比手册页完整得多。