“who -u”的输出中的“old”是什么意思？

Question

在 的列表中who -u，某些记录在空闲时间列中显示字符串“old”。我知道 ”。”表示会话不空闲。 “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.

信息的文档GNU工具通常比男人页。