Difference between revisions of "32v 1m who"
(New page: WHO(1) UNIX Programmer's Manual WHO(1) == NAME == who - who is on the system == SYNOPSIS == who [ who-file ] [ am I ] == DESCRIPTION == _W_...) |
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== NAME == | == NAME == | ||
| − | + | who - who is on the system | |
== SYNOPSIS == | == SYNOPSIS == | ||
| − | + | who [ who-file ] [ am I ] | |
== DESCRIPTION == | == DESCRIPTION == | ||
| − | + | '''Who''', without an argument, lists the login name, terminal | |
| − | + | name, and login time for each current UNIX user. | |
| − | + | Without an argument, '''who''' examines the /etc/utmp file to | |
| − | + | obtain its information. If a file is given, that file is | |
| − | + | examined. Typically the given file will be /usr/adm/wtmp, | |
| − | + | which contains a record of all the logins since it was | |
| − | + | created. Then '''who''' lists logins, logouts, and crashes since | |
| − | + | the creation of the wtmp file. Each login is listed with | |
| − | + | user name, terminal name (with `/dev/' suppressed), and date | |
| − | + | and time. When an argument is given, logouts produce a | |
| − | + | similar line without a user name. Reboots produce a line | |
| − | + | with `x' in the place of the device name, and a fossil time | |
| − | + | indicative of when the system went down. | |
| − | + | With two arguments, as in `who am I' (and also `who are | |
| − | + | you'), '''who''' tells who you are logged in as. | |
== FILES == | == FILES == | ||
| Line 32: | Line 32: | ||
== SEE ALSO == | == SEE ALSO == | ||
| − | + | [[32v 2m getuid|getuid(2)]], [[32v 5m utmp|utmp(5)]] | |
[[Category:32v man section 1]] | [[Category:32v man section 1]] | ||
Latest revision as of 17:55, 12 August 2010
WHO(1) UNIX Programmer's Manual WHO(1)
Contents
NAME
who - who is on the system
SYNOPSIS
who [ who-file ] [ am I ]
DESCRIPTION
Who, without an argument, lists the login name, terminal name, and login time for each current UNIX user.
Without an argument, who examines the /etc/utmp file to obtain its information. If a file is given, that file is examined. Typically the given file will be /usr/adm/wtmp, which contains a record of all the logins since it was created. Then who lists logins, logouts, and crashes since the creation of the wtmp file. Each login is listed with user name, terminal name (with `/dev/' suppressed), and date and time. When an argument is given, logouts produce a similar line without a user name. Reboots produce a line with `x' in the place of the device name, and a fossil time indicative of when the system went down.
With two arguments, as in `who am I' (and also `who are you'), who tells who you are logged in as.
FILES
/etc/utmp
