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Full Discussion: UID problem
Top Forums UNIX for Dummies Questions & Answers UID problem Post 8294 by rwb1959 on Tuesday 9th of October 2001 02:49:15 PM
Old 10-09-2001
Has your system ever been attached to the internet
prior to that first shutdown you mention?
Was ftp or telent active?

What I'm driving at here is that you may have been cracked
since you mention you get the powerdown message when you
try to login with the other users. You also mention that
these logins had worked previously. You may also want
to check what your system is doing with ps and who as well as
taking a look in /var/log/messages and /var/log/secure for any
abnormalities (i.e. large block of garbage).

If none of this is true, I don't know what else may be the
cause. You seem to have added new users properly...
useradd then passwd
...however, my recommendation would be the same...
save all your important data and configuration files then
wipe the disk clean and reinstall Linux. Before you connect
to the internet, be sure to secure (if not turn off) ftp and telnet.
 

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LEARN ABOUT OPENSOLARIS

shutdown

shutdown(1B)					     SunOS/BSD Compatibility Package Commands					      shutdown(1B)

NAME

       shutdown - close down the system at a given time

SYNOPSIS

       /usr/ucb/shutdown [-fhknr] time [warning-message]...

DESCRIPTION

       shutdown  provides  an  automated procedure to notify users when the system is to be shut down. time specifies when shutdown will bring the
       system down; it may be the word now (indicating an immediate shutdown), or it may specify a future time in one of two formats: +number  and
       hour:min.  The  first  form brings the system down in number minutes, and the second brings the system down at the time of day indicated in
       24-hour notation.

       At intervals that get closer as the apocalypse approaches, warning messages are displayed at terminals of all logged-in users, and of users
       who have remote mounts on that machine.

       At  shutdown  time a message is written to the system log daemon, syslogd(1M), containing the time of shutdown, the instigator of the shut-
       down, and the reason. Then a terminate signal is sent to init, which brings the system down to single-user mode.

OPTIONS

       As an alternative to the above procedure, these options can be specified:

       -f    Arrange, in the manner of fastboot(1B), that when the system is rebooted, the file systems will not be checked.

       -h    Execute halt(1M).

       -k    Simulate shutdown of the system. Do not actually shut down the system.

       -n    Prevent the normal sync(2) before stopping.

       -r    Execute reboot(1M).

FILES

       /etc/rmtab    remote mounted file system table

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       fastboot(1B), login(1), halt(1M), reboot(1M), syslogd(1M), sync(2), rmtab(4), attributes(5)

NOTES

       Only allows you to bring the system down between now and 23:59 if you use the absolute time for shutdown.

SunOS 5.11							    11 Oct 1994 						      shutdown(1B)
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