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Full Discussion: Trivial Unix Architecture question
Top Forums UNIX for Dummies Questions & Answers Trivial Unix Architecture question Post 70941 by tmarikle on Thursday 5th of May 2005 02:33:32 PM
Old 05-05-2005
Quote:
Originally Posted by Kelam_Magnus
The only feasible way I have heard is thru internet-facing boxes which run Xwindows and use web access...via DNS attacks or overflow attacks.
UNIX systems are not necessarily imune, they just aren't exploited like Windows systems. Set UID as well as buffer overrun vulnerabilities have been identified on UNIX systems from time to time for all sorts of applications including Oracle 9i, which was touted as unbreakable/unhackable. Who remembers the Morris worm that exploited sendmail and crahsed countless systems accross the net more than a decade ago? This attack was the first one that caught the world's attention due to its substantial impact. CERT has advised that yet another vulnerability exists in sendmail (albeit through unauthorized distrobutions) can be compromised even through a firewall.

Thomas
 

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LEARN ABOUT NETBSD

rtc

rtc(1M)                                                   System Administration Commands                                                   rtc(1M)

NAME

       rtc - provide all real-time clock and GMT-lag management

SYNOPSIS

       /usr/sbin/rtc [-c] [-z zone-name]

DESCRIPTION

       On x86 systems, the rtc command reconciles the difference in the way that time is established between UNIX and MS-DOS systems. UNIX systems
       utilize Greenwich Mean Time (GMT), while MS-DOS systems utilize local time.

       Without arguments, rtc displays the currently configured time zone string. The currently configured time zone string is based on  what  was
       last recorded by rtc-z zone-name.

       The  rtc  command  is  not normally run from a shell prompt; it is generally invoked by the system. Commands such as date(1) and rdate(1M),
       which are used to set the time on a system, invoke /usr/sbin/rtc -c to ensure that daylight savings time (DST) is corrected for properly.

OPTIONS

       -c              This option checks for DST and makes corrections if necessary. It is normally run once a day by a cron job.

                       If there is no RTC time zone or /etc/rtc_config file, this option will do nothing.

       -z zone-name    This option, which is normally run by the system at software installation time, is used to specify the time zone  in  which
                       the  RTC is to be maintained. It updates the configuration file /etc/rtc_config with the name of the specified zone and the
                       current GMT lag for that zone. If there is an existing rtc_config file, this command will update it. If not,  this  command
                       will create it.

FILES

       /etc/rtc_config         The data file used to record the time zone and GMT lag. This file is completely managed by /usr/sbin/rtc, and it is
                               read by the kernel.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Architecture                 |x86                          |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       date(1), rdate(1M), attributes(5)

SunOS 5.10                                                          3 Oct 2003                                                             rtc(1M)
All times are GMT -4. The time now is 12:58 PM.
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