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Full Discussion: Check invalid user account
Top Forums Shell Programming and Scripting Check invalid user account Post 302150652 by bakunin on Wednesday 12th of December 2007 04:29:00 AM
Old 12-12-2007
Quote:
Originally Posted by porter
Ironically, none of those conditions are illegal. UNIX often uses accounts that cannot login to perform services.
True! And, to expand on this, usually "nobody" doesn't need a password, "root" doesn't have its own home directory, etc., etc.

Maybe my olfactory system is too easily excited, but i thought i could smell the foul odor of homework being done here.

bakunin
 

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LOGINS(1)						    BSD General Commands Manual 						 LOGINS(1)

NAME
logins -- display account information SYNOPSIS
logins [-admopstux] [-g groups] [-l logins] DESCRIPTION
The logins utility displays information about user and system accounts. The following options are available: -a Display information about the password change and account expiration times for each account. -d Select accounts with duplicate UIDs. -g groups Select accounts that are members of the specified groups. If multiple group names are specified, they must be separated with com- mas. -l logins Select accounts matching the specified login names. If multiple names are specified, they must be separated with commas. -m Show information about secondary groups. -o Display the information for each account on a single line of colon-separated fields. -p Select accounts with no password. -s Select system accounts. These are currently defined as accounts with UIDs below 1000, plus the ``nobody'' account (UID 65534). -t Sort selected accounts by name rather than by UID. -u Select user accounts. These are currently defined as accounts with UIDs above 1000, except the ``nobody'' account (UID 65534). -x Display information about each account's home directory and shell. If multiple selection options are specified, all accounts matching any of the selection criteria will be displayed. If no selection options are specified, all accounts will be displayed. SEE ALSO
getgrent(3), getpwent(3), group(5), passwd(5), pw(8) HISTORY
The logins utility appeared in FreeBSD 4.10. AUTHORS
The logins utility was written by Dag-Erling Smorgrav <des@FreeBSD.org> based on similar utilities in other operating systems. BSD
March 6, 2004 BSD
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