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Full Discussion: Users Not Logged in
Top Forums Shell Programming and Scripting Users Not Logged in Post 302302008 by methyl on Sunday 29th of March 2009 06:45:23 PM
Old 03-29-2009
Please state your Operating System and version and preferred Shell in questions.
There is no generic unix command to show who has an account but is not logged in. There are enhanced versions of "finger" on some unixes but this is non-standard.

We can subtract "who -u" from "logins". We could equally use "listusers" instead of "logins" or even read /etc/passwd directly.
For example:

Code:
#!/bin/ksh
# Who is logged in now?
who -u | awk '{print $1}' >/tmp/who_u.$$
# Who has an account?
logins | awk '{print $1}' > /tmp/logins.$$
# Users who appear in "logins" but not in "who -u"
cat /tmp/logins.$$ /tmp/who_u.$$ | sort | uniq -u | pg
# Clean up temporary files
rm /tmp/logins.$$
rm /tmp/who_u.$$

 

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LEARN ABOUT SUNOS

listusers

listusers(1)							   User Commands						      listusers(1)

NAME

       listusers - list user login information

SYNOPSIS

       listusers [-g groups] [-l logins]

DESCRIPTION

       Executed without any options, this command lists all user logins sorted by login. The output shows the login ID and the account field value
       from the system's password database as specified by /etc/nsswitch.conf.

OPTIONS

       The following options are supported:

       -g groups       Lists all user logins belonging to group, sorted by login. Multiple groups can be specified as a comma-separated list.

       -l logins       Lists the user login or logins specified by logins, sorted by login. Multiple logins can be specified as a  comma-separated
		       list.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nsswitch.conf(4), attributes(5)

NOTES

       A user login is one that has a UID of 100 or greater.

       The -l and -g options can be combined. User logins will only be listed once, even if they belong to more than one of the selected groups.

SunOS 5.10							    18 Mar 1994 						      listusers(1)
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