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Who (Unix)
The standard Unix command who displays a list of users who are currently logged into the computer. The who command is related to the command w, which provides the same information but also displays additional data and statistics. == Specification == The Single Unix Specification (SUS) specifies that who should list information about accessible users. The XSI extension also specifies that the data of the username, terminal, login time, process ID, and time since last activity occurred on the terminal, furthermore, an alternate system database used for user information can be specified as an optional argument to who. The command can be invoked with the arguments am i or am I (so it is invoked as who am i or who am I), showing information about the current terminal only (see the command tty and the -m option below, of which this invocation is equivalent).
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Who (Unix)」の詳細全文を読む
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