I installed CentOS 7 from the DVD iso file: CentOS-7-x86_64-DVD-1503-01.iso
Yum update was used (with no update issues) to install and update many packages.
The installer is significantly different from CentOS 6 where one can
basicallychoose to "install everything" if one has the patience to check
My experience with RHEL and CentOS is quite limited, andwould classify me as
novice. I have been running CentOS 6for a little over a year and recently
brought up a CentOS 7system as a virtual machine under Windows 7.
One of the first things I usually do after installation isedit the /etc/sudoers
We have recently been asked to evaluate some computing machinery for
a new project. This particular end user has very limited experience
with the stated security requirements in a lights-out environment.
Their primary work (as well as mine) in the past has been with very
small, simple networks of d
We plan to use new digital voice recorders. Products are available
from Olympus, Sony, and others. All of these digital voice recorders
offer file-based audio storage. We would like to take advantage of
this feature and move the files to our computers.
It is not clear whether there is a differen
Many years ago, we began scrapping the RTOS approach for some
of our timing-critical applications. Our first applications
were based on Solaris real-time extensions and served well us
well for many years. Then came the era of shaky support for
Intel Solaris and we moved many applications to Linux
Recent power management discussions plugged into one of our
current frustrations, namely the interaction of the screen
lock and power-save features on Intel/CentOS 6 platforms.
We certainly would not have guessed that locking the screen
would inhibit going into the power-save mode, but it sure
seem
There has been a bit of grumbling recently about HP printer capability
in one of our smallest prototyping Labs. We have a single GigE switch
connecting a Windows 7 machine and a Dell/CentOS-6 machine. The CentOS
machine also has connectivity via another network. Currently, only the
Windows 7 mac
, January 2, 2016 4:21 AM, Nux! wrote:
Why go through all this trouble when you can connect the printer to the
network directly and be done with it?
--
Sent from the Delta quadrant using Borg technology!
Nux!
www.nux.ro
- Original Message -
> From: "Chris Olson"
We have a requirement for a new application that will be used
fixed, portable, and mobile. The hardware requirements drive
the need for networking as well as some general purpose and
special purpose interfaces. The software requirements are
quite simple in comparison to many of our much larger sy
Our smallest network has just three systems permanently attached
to a 100/1000 router. There is one additional port available to
temporarily plug in a laptop. The largest systems are both Dells,
one running Windows 7 and one running CentOS 6.7. The Windows 7
system supports three flavors of Linu
One of our STEM interns recently observed that there are
inexpensive clocks that sync via radio to standard time
services. This begged a question about why every computer
would not have a radio module to receive time. Our senior
staff did not have a good answer or if time from such a
radio module
It looks like we may have hit on a popular subject with the
questions about system time sources. Thanks for all of the
responses. Our intern and senior software staff now have
useful information and new perspective.
___
CentOS mailing list
CentOS@cento
We run several Intel-based CentOS machines. They are all at 6.9 or 7.x.
One of each OS is Oracle VirtualBox hosted on an up to date Windows 7 system.
We use these virtual machines for checkout of new applications before they
are loaded on native CentOS platforms. Regular weekly updates are run on
None of the previous kernels will boot properly.
On Monday, July 3, 2017 5:58 AM, "m.r...@5-cent.us"
wrote:
Chris Olson wrote:
> I went on vacation right after an update to one of our virtual CentOS 6.9
> systems so it was not restarted for a period of time.
My thanks to all that responded to my posting about our virtual
machine CentOS 6 system start-up issue. I found the alternative
boot options to be the most helpful. Interrupting the boot-up
process with Alt-d or Escape allowed me to see what appears to
be a quite normal string of start, install a
Jul 4, 2017, at 8:01 AM, Chris Olson wrote:
> Starting ipmidetectd: ipmidetectd: No nodes configured [FAILED]
> Starting sendmail:
Any chance that this system doesn’t have valid DNS lookups?
What I see above is that ipmidetetd failed (which doesn’t block) and then it is
stuck st
d sendmail.
Thanks again for responses to my messages. We are still learning.
On Tuesday, July 4, 2017 1:42 PM, Alexander Dalloz
wrote:
Am 04.07.2017 um 19:13 schrieb Gordon Messmer:
> On 07/04/2017 09:21 AM, Chris Olson wrote:
>> It remains a mystery what could have happened du
Several weeks ago, we posted a message seeking information about
time sources. There were many helpful and educational responses.
An excerpt from one of the responses is included below. We have
been following up with regard to how SDR capabilities might be
used for obtaining time using SDR dongl
Software Defined Radio
On Wednesday, July 19, 2017 8:40 AM, "m.r...@5-cent.us"
wrote:
Chris Olson wrote:
>
> Several weeks ago, we posted a message seeking information about
> time sources. There were many helpful and educational responses.
> An excerpt from o
Some of our largest systems run Windows because it supports engineering
applications that we use regularly. These applications have unattended
runs that often take between ten and fifteen hours to complete. We have
taken the recommendation of the application supplier and equipped these
Windows m
Many thanks to those that responded to my original posting with
information about Network UPS Tools and commercial UPS products.
In our planning a path forward to implement UPS-based power fail
protection, we have come across what appears to be an issue with
the state of the CentOS 6 machines bein
Many thanks once again to those that responded to my original posting
(and my follow up message) with information about Network UPS Tools,
other Linux-based tools like rtcwake, and commercial UPS products.
We have quite a bit more evaluation and testing work to do before
a power fail protection met
Small private networks are a necessary part of our business.
We also run some small networks with Internet connectivity
through firewall routers. The smallest of these networks
has only a printer and a mix of five CentOS and Windows 7
machines.
We use a commercial protection product on the W7 sy
We have been following the email list discussion regarding recent
problems with yum and the upgrade to the most current CentOS 7.
We have also tried some of the remedies suggested or recommended.
None of these measures has yielded success, and it is not totally
clear whether or not our most recent
We have been fortunate to hang onto one of our summer interns
for part time work on weekends during the current school year.
One of the intern's jobs is to load documents and data which
are then processed. The documents are .txt, .docx, and .pdf
files. The data files are raw sensor outputs usually
We have several CentOS 6 systems that are used in various configurations
of test equipment. One of the primary functions of these systems is the
connectivity to serial ports of some operational systems that have serial
port control requirements. Lack of interface bus slots led us to the use
of US
How does the latest Intel flaw relate to CentOS 6.x systems
that run under VirtualBox hosted on Windows 7 computers? Given
the virtual machine degree of separation from the hardware, can
this issue actually be detected and exploited in the operating
systems that run virtually? If there is a slow d
We have several CentOS 6.x systems that are incorporated into
suites of special test equipment. One of the requirements for
these systems is that they be kept up to date and they are kept
up to date using yum once per week or more frequently, as needed.
All of our CentOS 6.x systems have at least
Thanks for the information on festival.I think that this will work for at
leastsome of our applications.
On Tuesday, January 9, 2018 12:43 PM, Frank Cox wrote:
On Tue, 9 Jan 2018 17:34:32 + (UTC)
Chris Olson wrote:
> One of our test directors suggested that we use a digital co
We have had this problem before but not for a long time.The problem was
eventually traced to a router (we think)and corrected when the old router was
replaced.
On Thursday, January 11, 2018 2:17 PM, "m.r...@5-cent.us"
wrote:
I have a user who couldn't get in via WinSCP to a server.
We have some small networks with connectivity to the Internet
through firewall routers. The smallest has one Windows 7
system and three Linux systems including both CentOS 6 and
CentOS 7 machines. The Windows 7 systems have full Adobe
packages that are updated regularly and are trouble free.
On
One of our summer interns has stayed on working part time
on weekends during the school year. This schedule presents
an opportunity for technical investigations and some needed
performance testing. The last weekend assignment included
data rate testing on one specific network pathway.
Checking o
My thanks to all that responded to my posting about measuring
network performance. Helpful suggestions are always very much
appreciated. The type of testing that we were attempting does
not appear to be a major topic of interest on the list but the
additional information below may be helpful to s
We have recently been assigned to help with the development
of a system that will power non-computer/non-network devices
located at various places within a 10,000 square ft facility.
Most of these devices will operate on a fairly wide range of
DC input power.
The availability of surplus Cat-5 cabl
We run several CentOS 6 and CentOS 7 systems as virtual machines using
VirtualBox on Windows 7. Most of these systems have continuous up time.
The Windows 7 foundation platforms have no difficulty keeping accurate
system time unless they are shut down for some reason, which is rare in
our environm
Is there a good source of information about how Linux distributions
and installers identify and interact with the hardware devices in
a system? We are particularly interested in the shutdown process
that leads to complete power-off. Thanks.
___
CentOS
Our smallest network of systems has only four computers connected
via Gigabit Ethernet. The oldest and most stable platform is an eight
year old Dell E520 running CentOS 6.8. We often try out applications
on this Dell/CentOS machine before moving them to other systems on our
other networks.
Last
Yes, it looks like evince is not working for .ps files
on my system running fully up to date CentOS 6.8. Three
years ago, a .pdf version of this file was created and
it still displays as it should using evince.
[user@computer Documents]$ evince DPS_2014_1443inv.ps &
[1] 9865
[user@computer Documen
Everyone is back at work and starting to use computers on our
smallest network which has Internet access through a rather old
Linksys router. Two systems were left on and screen-locked over
the extra long weekend. There does not appear to have been any
Internet access interruption in our absence.
We have several small networks, some of which have only four systems
that are usually a mix of Windows 7 and CentOS 6 and CentOS 7 machines.
All of these systems are Internet connected and updated regularly when
yum finds packages available. Information about one of the CentOS 6
machines is includ
One of our summer interns has stayed on during the school
year to work some weekends on special assignments. This past
weekend, her assignment was to draft, and try out, procedures
for scanning all incoming regular mail including the envelopes.
This is a new effort for us because previous mail hand
One of our summer interns has stayed on during the school
year to work some weekends on special projects. This past
weekend, her assignment was to trouble shoot problems with
Firefox when trying to view various on-line training videos.
At some web sites, the video associated with the page will
not
We have a very old Dell desk top machine that has been running
CentOS 6 for the past five years. It received a new, 1 TB disk
and additional memory before the OS installation. It has been
the primary Linux machine in our smallest and most remote field
office. It has been updated at least once a
We recently installed CentOS 7 from DVD. Our install selection was the
GNOME desktop option. yum update yielded about 465 megabytes of updates
all of which were successful with no warnings. The multi media option
was not chosen because KDE was listed. GNOME was not apparent in the
software list f
We recently installed CentOS 7 on a system. We chose the GNOME
desktop install option and have used yum to install all of the
available updates. The first run of yum update yielded about
450 megabytes of items to be installed or updated. All of the
updates have been successful.
One issue with our
In our smallest office, we have a Dell CentOS 7 system, a
Windows system and an HP 8610 printer, all hard-wire Ethernet
connected with a Linksys router. The router provides Internet
connection. All of the network-connected systems get their
IP address from the router at power up.
Successful networ
A few years ago, one of our interns was curious about system
time keeping features in computer systems. This intern was
also the proud owner of an inexpensive Radio-Controlled Clock.
The intern wondered why computer motherboards were not just
equipped with a chip like the ones in the RCC so that t
We located an application recommended by one of customers
for sharing certain data. It was available for installation
using a few different methods. Using yum was also recommended
for the installation. The install instructions began with
what appeared to be a fairly typical command as indicated
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