Il 02/07/20 16:39, Valeri Galtsev ha scritto:
On 2020-07-02 08:28, Alessandro Baggi wrote:
Il 02/07/20 15:02, Valeri Galtsev ha scritto:
On 7/2/20 3:22 AM, Alessandro Baggi wrote:
Il 01/07/20 17:13, Leroy Tennison ha scritto:
I realize this shouldn't happen, the file is a tgz and isn't b
I need to connect an older APS UPS unit to a machine running CentOS 7.
Unfortunately the UPS only has a serial port whereas the computer does not. I
am aware that there are USB-serial adapters but that the hardware or the
drivers might fall short of expectations.
Does anyone have positive exper
If it is an older APC UPS, that uses basic serial signaling, it's not
actually a serial port, it's a criss-cross special serial cable that
manages the control lines with DSR DTR CTS and so forth. these are very
fussy cables that have to be exactly the right one or the UPS may just
abruptly shut off
I've used one on a Linux laptop, it "just worked" but the OS wasn't CentOS 7.
From: CentOS on behalf of H
Sent: Wednesday, July 8, 2020 10:13 AM
To: Centos Mailing List
Subject: [EXTERNAL] [CentOS] USB-serial adapter for CentOS 7
CAUTION: This email originated
On 7/8/20 11:14 AM, H wrote:
> I need to connect an older APS UPS unit to a machine running CentOS 7.
> Unfortunately the UPS only has a serial port whereas the computer does not. I
> am aware that there are USB-serial adapters but that the hardware or the
> drivers might fall short of expectati
I've several USB <-> RS-232 dongles around. As well as a few embedded
devices. They all "Just Work (tm)" on Redhat, CentOS, Fedora, Debian,
Raspian and Kali.
Knock on wood - never had a problem using any of them. As the drivers are
part of the kernel, I'd expect any distro using a recent kernel to
On 2020-07-08 10:23, Leroy Tennison wrote:
I've used one on a Linux laptop, it "just worked" but the OS wasn't CentOS 7.
It is not clear if you used USB from APC UPS to USB port on the machine
side or USB - to - "serial". USB to USB with standard USB cable will work.
If one uses serial t
On July 8, 2020 11:39:29 AM EDT, Valeri Galtsev
wrote:
>
>
>On 2020-07-08 10:23, Leroy Tennison wrote:
>> I've used one on a Linux laptop, it "just worked" but the OS wasn't
>CentOS 7.
>>
>
>It is not clear if you used USB from APC UPS to USB port on the machine
>
>side or USB - to - "serial". U
Everyone,
I am in the process of migrating over a samba Linux VM from an openvz
based system to a vmware based system. I am migrating over these services:
apache
samba
rsync (daemon via xinetd)
I'm trying to improve my documentation and I want to make a linux vm
best practices SOP that can be u
> On Jul 8, 2020, at 10:46 AM, H wrote:
>
> On July 8, 2020 11:39:29 AM EDT, Valeri Galtsev
> wrote:
>>
>>
>> On 2020-07-08 10:23, Leroy Tennison wrote:
>>> I've used one on a Linux laptop, it "just worked" but the OS wasn't
>> CentOS 7.
>>>
>>
>> It is not clear if you used USB from APC
On Wed, Jul 8, 2020 at 8:46 AM H wrote:
>
> I believe I mentioned that the UPS has the serial port, the computer thus
> has USB.
>
>
yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
former do NOT use the rx/tx data of the serial port at all, they ONLY use
the serial port
> On Jul 8, 2020, at 10:58 AM, John Pierce wrote:
>
> On Wed, Jul 8, 2020 at 8:46 AM H wrote:
>
>>
>> I believe I mentioned that the UPS has the serial port, the computer thus
>> has USB.
>>
>>
> yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
> former do NOT use
On 2020-07-08 11:28, Tate Belden wrote:
I've several USB <-> RS-232 dongles around. As well as a few embedded
devices. They all "Just Work (tm)" on Redhat, CentOS, Fedora, Debian,
Raspian and Kali.
Even if you did have an RS232 port on the box, the serial drivers for
CentOS 7 have
never worked
-> "nobody uses RS232 anymore!"
Somebody needs to update the hand writing on the wall, although the physical
hardware may be an RJ-45, the RS232 protocol is still used on headless devices
and probably other things. I use minicom more than I wish but it's still
required.
___
Once upon a time, John Pierce said:
> yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
> former do NOT use the rx/tx data of the serial port at all, they ONLY use
> the serial port control signals, and they probably will NOT work with a
> USB port because they require ver
Once upon a time, mailist said:
> Even if you did have an RS232 port on the box, the serial drivers
> for CentOS 7 have
> never worked correctly. I had an application using RS232 that
> worked perfectly
> under CentOS 6, and then worked intermittently under CentOS 7, and
> failed miserably
> on C
On Wed, Jul 08, 2020 at 01:40:27PM -0500, Chris Adams wrote:
> Once upon a time, John Pierce said:
> > yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
> > former do NOT use the rx/tx data of the serial port at all, they ONLY use
> > the serial port control signals, and t
On 07/08/2020 03:02 PM, Fred Smith wrote:
> On Wed, Jul 08, 2020 at 01:40:27PM -0500, Chris Adams wrote:
>> Once upon a time, John Pierce said:
>>> yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
>>> former do NOT use the rx/tx data of the serial port at all, they ONLY us
On 07/08/2020 02:40 PM, Chris Adams wrote:
> Once upon a time, John Pierce said:
>> yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
>> former do NOT use the rx/tx data of the serial port at all, they ONLY use
>> the serial port control signals, and they probably will NOT
On 07/08/2020 11:58 AM, John Pierce wrote:
> On Wed, Jul 8, 2020 at 8:46 AM H wrote:
>
>> I believe I mentioned that the UPS has the serial port, the computer thus
>> has USB.
>>
>>
> yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
> former do NOT use the rx/tx data of th
El vie., 3 jul. 2020 a las 11:05, Alexander Dalloz
() escribió:
>
>
> I would guess that the scheduler "noop" isn't available, thus that
> specific error message.
>
> On my physical Server CentOS 7 with latest kernel:
>
> # cat /sys/block/nvme0n1/queue/scheduler
> [none] mq-deadline kyber
>
> The K
Check the voltages on your adapter. I use such adapters in the machine shop
so machinists can share the CNC programs they write on a PC with their CNC
controllers. The CNC controllers can be fussy about voltages, and some
cheap RS232-USB adapters only generate +/-5vdc. It's within the RS232 spec
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