Re: [CentOS] Compiling custom "vmlinuz" PXE kernel?

[Zdenek Sedlak]

On 2017-04-04 02:33, Locane wrote:
> Hello CentOS list, I still need help.
>
> Does anyone know how I would go about creating my own "vmlinuz" PXE
> kernel?  I'm still trying to get the NUC6CAYH to load to a LiveCD, and I'm
> getitng nowhere with Intel.
>
> My company wants to do hundreds of these per month;  we're not above paying
> for professional help at this point.
>
> My current line of reasoning is to get whatever specialized memory and CPU
> drivers the NUC6CAYH requires to recognize properly and bake them in to a
> custom vmlinuz PXE kernel that loads the initial ramdisk image.  This
> kernel is located in a regular CentOS 7.3 DVD at
> CentOS-7-x86_64-DVD-1611/images/pxeboot/vmlinuz.
>
> Has anyone done this before?  Is there documentation online?
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Hello,

long time ago we did this for VMware Tools and CentOS/RHEL 5. Basically,
you need to extract the vmlinuz using gzip/cpio, add the necessary
information and pack again. If you search for something like 'adding
VMware Tools to RHEL 5' you should get a quite descriptive result...

If worked for RHEL5/6, so it will work for 7 as well.

//Zdenek
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Re: [CentOS] Realtime repo

[Nux!]

yum-config-manager --add-repo=http://mirror.centos.org/centos/7/rt/x86_64/

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- Original Message -
> From: "Tim" 
> To: "CentOS mailing list" 
> Sent: Sunday, 2 April, 2017 23:16:19
> Subject: [CentOS] Realtime repo

> Hello,
> 
> is there an easy way to activate/install the realtime-repo under
> http://mirror.centos.org/centos/7/rt/ or do I have to write the repo-file
> manually?
> 
> Thanks in advance
> Tim
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Re: [CentOS] Using environment variables in mariadb

[Nux!]

You can just put the credentials in a my.cnf file to avoid entering them all 
the time

e.g.  /root/.my.cnf

[client]
user=root
password=thepassword

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- Original Message -
> From: "Robert Moskowitz" 
> To: "CentOS mailing list" 
> Sent: Wednesday, 15 March, 2017 04:07:36
> Subject: Re: [CentOS] Using environment variables in mariadb

> On 03/14/2017 06:29 PM, Richard wrote:
>>
>>> Date: Tuesday, March 14, 2017 14:53:01 -0700
>>> From: Robert Moskowitz 
>>>
>>> I want to script a rather simple create database operation.  Thing
>>> is, I have to provide the password for that database.  I would like
>>> to do this with an environment variable, but the simple approach
>>> dose not work:
>>>
>>> mailpswd=charlie
>>>
>>> mysql -u root -p
>>>
>>> CREATE DATABASE mailfix;
>>> CREATE USER 'mailfix'@'localhost' IDENTIFIED BY $mailpswd;
>>> GRANT ALL PRIVILEGES ON `mailfix` . * TO 'mailfix'@'localhost';
>>>
>>> Of course the mysql command needs the mysql root password, but that
>>> is as expected.  But mysql will not process $mailpswd, not
>>> surprisingly.
>>>
>>> I know I could create a file with these commands, sed the password
>>> into the file, then pipe thr file into mysql.  I would rather do
>>> this directly without a temp file.
>>>
>> Using the "-e --execute" option you can execute mysql/mariadb
>> commands from the command line, one at a time. You don't have to put
>> them into a file first. That should allow you to do what you're
>> after, including doing variable substitution of the password on the
>> line you want to execute. You can also put the mysql root pw on that
>> line with substitution so no prompting is involved.
> 
> I saw this, and at first did not like it, as how to manage the mysql
> root password, so I found how to use here doc:
> 
> mysql -u root -p < CREATE DATABASE postfix;
> CREATE USER postfix@localhost IDENTIFIED BY "$Postfix_Database_Password";
> GRANT ALL PRIVILEGES ON postfix.* TO postfix@localhost;
> EOF
> 
> next refinement is:
> 
> mysql -u root -p$mysql_root_Password < CREATE DATABASE postfix;
> CREATE USER postfix@localhost IDENTIFIED BY "$Postfix_Database_Password";
> GRANT ALL PRIVILEGES ON postfix.* TO postfix@localhost;
> EOF
> 
> 
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Re: [CentOS] M.2 PCI-E card

[Markku Kolkka]

4.4.2017, 4.21, Alice Wonder kirjoitti:
>
> Thanks! I ordered a 2.5" SATA drive and they screwed up and sent me M.2
> - I'll be sure to look at the booklet (Intel SSD 5 but there may be more
> than one variant?)

Intel 5 series SSDs use SATA interface, so the discussion about NVMe
support doesn't apply in this case. You can use an adapter like this to
mount it in a 2.5" drive slot: http://preview.tinyurl.com/lm4952g

-- 
Markku Kolkka
markku.kol...@iki.fi

---
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[CentOS] CentOS-announce Digest, Vol 146, Issue 1

[centos-announce-request]

Send CentOS-announce mailing list submissions to
centos-annou...@centos.org

To subscribe or unsubscribe via the World Wide Web, visit
https://lists.centos.org/mailman/listinfo/centos-announce
or, via email, send a message with subject or body 'help' to
centos-announce-requ...@centos.org

You can reach the person managing the list at
centos-announce-ow...@centos.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of CentOS-announce digest..."


Today's Topics:

   1. CentOS Linux 5 EOL (Johnny Hughes)


--

Message: 1
Date: Mon, 3 Apr 2017 07:12:27 -0500
From: Johnny Hughes 
To: CentOS-Announce 
Subject: [CentOS-announce] CentOS Linux 5 EOL
Message-ID: <4e6a4cf7-e532-ad53-a775-95bef831e...@centos.org>
Content-Type: text/plain; charset="utf-8"

CentOS Linux 5 has reached End of Life, as of 31 March 2017.

Please note that the latest version of CentOS Linux 5 (version 5.11 with
updates) will remain available here (archived):

http://vault.centos.org/5.11/

Please also note that this directory will not be maintained as there are
no more public source code releases for upstream RHEL-5.  That means
there will be no more security updates for CentOS Linux 5.  The CentOS
team does not recommend using CentOS Linux 5 for any purpose.

If you have workloads that can not be moved from the EL5 code base, you
can obtain paid extended support from Red Hat for RHEL-5.  See ELS
(Extended Life-cycle Support) from this link:

https://access.redhat.com/support/policy/updates/errata

Thanks,
Johnny Hughes


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Re: [CentOS] Compiling custom "vmlinuz" PXE kernel?

[Denniston, Todd A CIV NAVSURFWARCENDIV Crane, JXVS]

> From: Locane [loc...@gmail.com]
> Sent: Monday, April 03, 2017 8:33 PM
> To: CentOS mailing list
> Subject: [CentOS] Compiling custom "vmlinuz" PXE kernel?
> 
> Hello CentOS list, I still need help.
> 
> Does anyone know how I would go about creating my own "vmlinuz" PXE
> kernel?  I'm still trying to get the NUC6CAYH to load to a LiveCD, and I'm
> getitng nowhere with Intel.
> 
> My company wants to do hundreds of these per month;  we're not above paying
> for professional help at this point.
> 
> My current line of reasoning is to get whatever specialized memory and CPU
> drivers the NUC6CAYH requires to recognize properly and bake them in to a
> custom vmlinuz PXE kernel that loads the initial ramdisk image.  This
> kernel is located in a regular CentOS 7.3 DVD at
> CentOS-7-x86_64-DVD-1611/images/pxeboot/vmlinuz.
> 
> Has anyone done this before?  Is there documentation online?

If I understand correctly you are wanting to build a kernel to boot the install 
process with, i.e., boot to run anaconda.
For some reason I never had any luck [with EL4] replacing the modules in the 
anaconda initrd.img with the ones for the kernel I built, so I took a more 
*brittle* path.
I built a kernel that included *_all_* the drivers I needed (and only those 
*_needed_*) built into the kernel itself, i.e., *not* as modules.  I then set 
the process up to boot from the vmlinuz I built.  It was not right to ignore 
the mods in the initrd, but it worked enough to get us going, IIRC it was 
because some USB driver we needed was not built in and we were installing from 
a USB hard drive.
Also note, you need to grab the kernel config for an EL kernel of your distro 
and start modifying from there because some of the later tools in the install 
chain expect most of the kernel to be configured as RH would do it.


*_all_* - using this method you can't depend on ANY modules, everything you 
need to activate all the hardware in the system has to be in the kernel image 
(vmlinuz).  If you can figure out how to correctly mod the initrd then you can 
use some modules again, and then only the modules you need to boot and read the 
initrd have to be in vmlinuz.  Also I don't recall what they are, but there are 
some size limits to how big vmlinuz can be, so don't just build every driver 
into the kernel.

Good luck.
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[CentOS] Xorg problem

[Rosenthal, Shoshana]

I updated to Centos 6.8.
Every thing is working, except Xorg does not startup.
When I look at top, it seems that Xorg keeps trying but not
succeeding to start.
Any idea what the problem might be?

Thanks
Shoshana Rosenthal
srosent...@cfa.harvard.edu
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Re: [CentOS] Xorg problem

[Styma, Robert (Nokia - US/Phoenix)]

> I updated to Centos 6.8.
> Every thing is working, except Xorg does not startup.
> When I look at top, it seems that Xorg keeps trying but not
> succeeding to start.
> Any idea what the problem might be?

I had the same problem going to 6.8.   In my case the problem stemmed from the 
fact that my machine has a MACH64 video card.  The updated Xorg has a reference 
xf86LinearVidMem. I opened bug 1422622 at bugzilla.redhat.com.  This was on 
2/15/2017.  So far the bug is just sitting there.

My work around was to disable the main repo's in /etc/yum.repos.d and enable 
6.7 in the vault repo.  Did a distribution synchronization.  Here are the notes 
from what worked:  (may be line wrapping issues in what follows)

Went back to the x64 version and figured out
how to roll back to 6.7:
mount -t nfs phxbkup2:/iso/centos6.7x64 /media/CentOS
# This one failed with dependency issues
yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 
distribution-synchronization
# Erased the problem packages
yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 erase  
python-libipa_hbac-1.13.3-22.el6_8.4.x86_64 
mesa-libxatracker-11.0.7-4.el6.x86_64 xorg-x11-drivers-7.3-13.4.el6.x86_64 
mesa-libxatracker-11.0.7-4.el6.x86_64
yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 erase  xcb-util 
xcb-util-renderutil
# Now it worked 
yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 
distribution-synchronization
# put pack the drivers
yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 install  
xorg-x11-drivers
yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 install  
python-libipa_hbac mesa-libxatracker mesa-libxatracker
#  These not available on the media and not reinstalled. python-libipa_hbac 
mesa-libxatracker mesa-libxatracker
# Now it worked.
 
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Re: [CentOS] Xorg problem

[m . roth]

Rosenthal, Shoshana wrote:
> I updated to Centos 6.8.
> Every thing is working, except Xorg does not startup.
> When I look at top, it seems that Xorg keeps trying but not
> succeeding to start.
> Any idea what the problem might be?

Was it working before? If so, my first thought would be to tell it init 3,
to multiuser mode without X running, and then run startx, and see if it
gives you any useful messages. /var/log/Xorg.x.log is extremely difficult
to find useful information, unless in the last few lines you find an EE
message.

mark

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Re: [CentOS] M.2 PCI-E card

[Darr247]

> Intel 5 series SSDs use SATA interface, so the discussion about NVMe
> support doesn't apply in this case. You can use an adapter like this to
> mount it in a 2.5" drive slot: http://preview.tinyurl.com/lm4952g

Links like
http://amazon.com/dp/B00ITJ7U20
or http://amazon.com/dp/B00PY11SYM
might last longer (for archived mail list purposes) than auction site links,
which are typically inaccessible 90 days or less after the listing ends.


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Re: [CentOS] Xorg problem

[Rosenthal, Shoshana]

Thanks for responding. I really don't know why I have the problem
my computer is a Dell computer with the standard parts.
I am not sure that your fix will work for me.
I am using the computer remotely and am still looking for a
solution.

Thanks
Shoshana

On Tue, Apr 4, 2017 at 10:27 AM, Styma, Robert (Nokia - US/Phoenix) <
robert.st...@nokia.com> wrote:

> > I updated to Centos 6.8.
> > Every thing is working, except Xorg does not startup.
> > When I look at top, it seems that Xorg keeps trying but not
> > succeeding to start.
> > Any idea what the problem might be?
>
> I had the same problem going to 6.8.   In my case the problem stemmed from
> the fact that my machine has a MACH64 video card.  The updated Xorg has a
> reference xf86LinearVidMem. I opened bug 1422622 at bugzilla.redhat.com.
> This was on 2/15/2017.  So far the bug is just sitting there.
>
> My work around was to disable the main repo's in /etc/yum.repos.d and
> enable 6.7 in the vault repo.  Did a distribution synchronization.  Here
> are the notes from what worked:  (may be line wrapping issues in what
> follows)
>
> Went back to the x64 version and figured out
> how to roll back to 6.7:
> mount -t nfs phxbkup2:/iso/centos6.7x64 /media/CentOS
> # This one failed with dependency issues
> yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7
> distribution-synchronization
> # Erased the problem packages
> yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 erase
> python-libipa_hbac-1.13.3-22.el6_8.4.x86_64 
> mesa-libxatracker-11.0.7-4.el6.x86_64
> xorg-x11-drivers-7.3-13.4.el6.x86_64 mesa-libxatracker-11.0.7-4.el6.x86_64
> yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 erase
> xcb-util xcb-util-renderutil
> # Now it worked
> yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7
> distribution-synchronization
> # put pack the drivers
> yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 install
> xorg-x11-drivers
> yum --disablerepo=\* --enablerepo=c6-media  --releasever=6.7 install
> python-libipa_hbac mesa-libxatracker mesa-libxatracker
> #  These not available on the media and not reinstalled.
> python-libipa_hbac mesa-libxatracker mesa-libxatracker
> # Now it worked.
>
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Re: [CentOS] Xorg problem

[John R Pierce]

On 4/4/2017 11:00 AM, Rosenthal, Shoshana wrote:

my computer is a Dell computer with the standard parts.



dell has probably made 1000 different computers, maybe more, all 'with 
standard parts', whatever that means.


The CPU and 'chipset', and what video chip its using are all important 
factors here.


--
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[CentOS] libreoffice vs. PDF fillable forms

[Michael Hennebry]

On centos 6, I've been trying to use LibreOffice to fill in
entries of a PDF with fillable forms.
In addition to all my other problems, the font size is stuck on 24.
I can change it, but whenever I so much a take a deep breath,
it's back to 24 again.
How do I stop this?

So far, all my searches have given me stuff about making fillable forms,
but nothing about dealing with existing ones.

--
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Re: [CentOS] libreoffice vs. PDF fillable forms

[mark]

Michael Hennebry wrote:

On centos 6, I've been trying to use LibreOffice to fill in
entries of a PDF with fillable forms.
In addition to all my other problems, the font size is stuck on 24.
I can change it, but whenever I so much a take a deep breath,
it's back to 24 again.
How do I stop this?

So far, all my searches have given me stuff about making fillable forms,
but nothing about dealing with existing ones.


For CentOS 6, I just use acroread. I'm annoyed to find that once I've
saved the forms via print->CUPS-pdf, evince, if I remember from a couple
weeks ago, can see the filled out form, but not print it filled out, while
acroread can print it out for real (like, sending them into a Certain
Government Agency, it being that time of the year).

Haven't tried in CentOS 7, though I did just find something annoying - the
default pdf viewer in 7, okular, won't let me copy and paste from a .pdf
to a text document. However, evince *does* let me select some lines and
copy and paste.

   mark

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Re: [CentOS] sound problems... pulseaudio/pavucontrol

[ken]

On 04/03/2017 07:47 PM, Fred Smith wrote:

On Mon, Apr 03, 2017 at 12:53:54PM -0400, ken wrote:

On 04/02/2017 01:31 PM, Kay Schenk wrote:


On 03/29/2017 06:43 AM, ken wrote:

On 03/28/2017 08:53 PM, ken wrote:

The www has failed me with this, so I'm trying you guys.  Sound worked
great out of the box when I installed 7.2... Yay!  I could watch all
kinds of videos, like on facebook and youtube.  And I could listen to
most podcasts too.  But then something happened. It was either a
kernel upgrade or that I installed vlc (for watching videos on DVD)
and the whole stack of codecs for it... I don't know exactly when, but
at some point I no longer had sound with youtube  and other web
videos.  The videos played fine, just no sound.  Note that using vlc,
both video and the audio with it play just fine.  I need to select the
audio driver (from a list in a vlc menu), however, else the sound
won't work in vlc either.

If I go into the Applications menu, then System Tools -> Settings ->
Sound, under "Choose a device for sound output:" there are no devices
listed.  There used to be.

If I run "aplayer file.wav", nothing plays (no sound at all) and I get
the error "main:786: audio open error: No such file or directory".
If, on the other hand, I run "aplay file.wav -D plughw:0" (i.e.,
specify the/a device), I do get sound, the file does play.

I ran alsa-info.sh and it posted tons of info from it on my setup at
http://www.alsa-project.org/db/?f=1dba91886be054df4816000768a0f5b109947a48.

Yet it still doesn't tell me what's missing.

Anyone here have an idea...? or thoughts about where to look next?

tia,
ken

Still poking around my system for a solution, I found this comment at
the top of /usr/lib/systemd/system/alsa-state.service and two other
files in the same directory:


# Note that two different ALSA card state management schemes exist and
they
# can be switched using a file exist check -
/etc/alsa/state-daemon.conf .

The /etc/alsa/state-daemon.conf file consists of one line:


# Remove this file to disable the alsactl daemon mode

I understand that a daemon continually runs, waiting for an event and
then acts in some way in response, but it has to mean something more in
this context.  Anyone familiar with the internals of this?



I am not on systemd right now. I'm on CentOS 6.8. However, on an
openSUSE version I was. Sound problems were the bane of my
existence forever it seemed. So it maye take you a while to
troubleshoot this. Using JUST alsa you should be able to play
sound files at the command line. See:
http://www.alsa-project.org/main/index.php/Main_Page


I think I may have installed pulse-audio to get things working
under systemd with my GUI. What is your GUI? This may be a factor.


Thanks for the thought.  This is quite plausible.  I did a little
reading at the site you suggested and then at another which was
linked off of that.  I didn't find anything helpful at either place
yet... well, except that in the audio stack alsa is just one layer;
jack and pulseaudio ride on top of it.  Apparently sound on linux
can use all of them-- and others on both of the same layers-- all at
the same time.  This is probably what makes the configuration of
them all so challenging.

In the middle of reading those sites I decided to see if audacity (a
quite sophisticated and solid program) could somehow handle sound. I
installed it and fired it up.  Out of the box it didn't work.  But I
simply had to choose the correct device from audacity's drop-down
menu and, viola, it would produce sound from a loaded file.  Cool.

Right after that, I tried running "aplay
/usr/share/sounds/alsa/Front_Right.wav" and that worked.  Previously
it didn't, although (as noted above)  that same command when
specifying the device did (i.e., "aplay
/usr/share/sounds/alsa/Front_Right.wav -D plughw:0").  So apparently
installing and/or running audacity fixed something, but not
everything.

Another trippy discovery:  I used rpm to verify all the files
installed with all the alsa* packages and there were absolutely no
changes to any of them... they're all exactly as they were when
first installed.  Since sound worked exquisitely when I first
installed 7.2 on this box and no alsa files have been changed since
then, it's hard to find the fault with alsa.

Although aplay is back to working without having to specify the
device, I still don't get sound out of youtube videos (even though I
checked the settings and restarted Firefox), and gnome3's System
Settings -> Sound still lists no devices at all.  These are two
major failures.

Are you, perchance, using Firefox-52? At version 52, they switched
Firefox to use Pulse instead of Alsa. So you'll probably need to
fire up pavucontrol and mess with its sliders to get firefox audio
working.


Good call, Fred.  Just today I got a message when, doing testing, a 
message came up in Firefox that I needed to install pulseaudio.* Well, I 
never installed pulseaudio, but it's already installed,** so it must 
have

Re: [CentOS] Compiling custom "vmlinuz" PXE kernel?

[Phil Manuel]

Hi,

This page
http://www.pkje.net/meander/2014/07/27/centos-6-5-on-supermicro-hft-server/
detailed
how to add modules for C6, I imagine the process to be similar for C7

On Wed, 5 Apr 2017 at 00:02 Denniston, Todd A CIV NAVSURFWARCENDIV Crane,
JXVS  wrote:

> > From: Locane [loc...@gmail.com]
> > Sent: Monday, April 03, 2017 8:33 PM
> > To: CentOS mailing list
> > Subject: [CentOS] Compiling custom "vmlinuz" PXE kernel?
> >
> > Hello CentOS list, I still need help.
> >
> > Does anyone know how I would go about creating my own "vmlinuz" PXE
> > kernel?  I'm still trying to get the NUC6CAYH to load to a LiveCD, and
> I'm
> > getitng nowhere with Intel.
> >
> > My company wants to do hundreds of these per month;  we're not above
> paying
> > for professional help at this point.
> >
> > My current line of reasoning is to get whatever specialized memory and
> CPU
> > drivers the NUC6CAYH requires to recognize properly and bake them in to a
> > custom vmlinuz PXE kernel that loads the initial ramdisk image.  This
> > kernel is located in a regular CentOS 7.3 DVD at
> > CentOS-7-x86_64-DVD-1611/images/pxeboot/vmlinuz.
> >
> > Has anyone done this before?  Is there documentation online?
>
> If I understand correctly you are wanting to build a kernel to boot the
> install process with, i.e., boot to run anaconda.
> For some reason I never had any luck [with EL4] replacing the modules in
> the anaconda initrd.img with the ones for the kernel I built, so I took a
> more *brittle* path.
> I built a kernel that included *_all_* the drivers I needed (and only
> those *_needed_*) built into the kernel itself, i.e., *not* as modules.  I
> then set the process up to boot from the vmlinuz I built.  It was not right
> to ignore the mods in the initrd, but it worked enough to get us going,
> IIRC it was because some USB driver we needed was not built in and we were
> installing from a USB hard drive.
> Also note, you need to grab the kernel config for an EL kernel of your
> distro and start modifying from there because some of the later tools in
> the install chain expect most of the kernel to be configured as RH would do
> it.
>
>
> *_all_* - using this method you can't depend on ANY modules, everything
> you need to activate all the hardware in the system has to be in the kernel
> image (vmlinuz).  If you can figure out how to correctly mod the initrd
> then you can use some modules again, and then only the modules you need to
> boot and read the initrd have to be in vmlinuz.  Also I don't recall what
> they are, but there are some size limits to how big vmlinuz can be, so
> don't just build every driver into the kernel.
>
> Good luck.
> --
> Even when this disclaimer is not here:
> I am not a contracting officer. I do not have authority to make or modify
> the terms of any contract.
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[CentOS] Timezone and date

[Jerry Geis]

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time zone ?
For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a standard time
zone.

Thanks, - I know weird situation the other end not supported EDT.


Jerry
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Re: [CentOS] Timezone and date

[Steven Tardy]

> On Apr 4, 2017, at 9:22 PM, Jerry Geis  wrote:
> 
> sending information to another system

What does this mean? Syslog?
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Re: [CentOS] Timezone and date

[John R Pierce]

On 4/4/2017 6:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time zone ?
For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a standard time
zone.

Thanks, - I know weird situation the other end not supported EDT.



# cat /etc/timezone
America/Los_Angeles


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Re: [CentOS] Timezone and date

[ken]

On 04/04/2017 09:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time zone ?
For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a standard time
zone.

Thanks, - I know weird situation the other end not supported EDT.


Jerry
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"man date" shows a few options:


   %z +hhmm numeric time zone (e.g., -0400)

   %:z+hh:mm numeric time zone (e.g., -04:00)

   %::z   +hh:mm:ss numeric time zone (e.g., -04:00:00)

   %:::z  numeric  time  zone  with  :  to  necessary precision 
(e.g., -04,

  +05:30)

   %Z alphabetic time zone abbreviation (e.g., EDT)


That is, perhaps the "other system" wants some kind of numeric 
representation.  Without knowing the recipient app on that other system, 
this is just a guess.


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Re: [CentOS] Timezone and date

[John R Pierce]

On 4/4/2017 7:51 PM, John R Pierce wrote:

On 4/4/2017 6:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time 
zone ?

For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a 
standard time

zone.

Thanks, - I know weird situation the other end not supported EDT.



# cat /etc/timezone
America/Los_Angeles 


oops, sent too soon.   thats the canonical time zone.   things like CST, 
they aren't globally reliable, in China, CST is China Standard Time, 
while in the USA its Central Standard Time. OOOPS.   there's a bunch 
more such conflicts in 3-letter timezones around the world, they had 
best be avoided.



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Re: [CentOS] Timezone and date

[ken]

On 04/04/2017 10:57 PM, ken wrote:

On 04/04/2017 09:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time 
zone ?

For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a 
standard time

zone.

Thanks, - I know weird situation the other end not supported EDT.


Jerry
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"man date" shows a few options:


   %z +hhmm numeric time zone (e.g., -0400)

   %:z+hh:mm numeric time zone (e.g., -04:00)

   %::z   +hh:mm:ss numeric time zone (e.g., -04:00:00)

   %:::z  numeric  time  zone  with  :  to  necessary precision 
(e.g., -04,

  +05:30)

   %Z alphabetic time zone abbreviation (e.g., EDT)


That is, perhaps the "other system" wants some kind of numeric 
representation.  Without knowing the recipient app on that other 
system, this is just a guess.


EST5EDT

"man timezone" might also be inspiring.


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