wtmp—This file records all logins (and logouts) by users.
这个文件记录了用户进行的所有登录（和注销）。
2
The lines where you get only the line information are logouts rather than logins, as shown here in this fragment in Listing 20.
获取行信息所在的行是注销而不是登录，如清单20中的代码片段所示。
3
How is it, then, that Web developers talk about "sessions," "logins" and "logouts," "personalization," "hijacking," and other such inherently stateful ideas?