Re: [CentOS] CentOS on new Dell

[Alice Wonder]

On 10/13/2016 07:39 PM, John R Pierce wrote:

On 10/13/2016 7:10 PM, Rob Kampen wrote:

Mmn, that didn't work. I dd'd the latest Fedora Live iso onto a USB
drive, put it into a brand spanking new Dell Latitude E7470, hit F12
at Dell logo and got "Selected boot device failed". Do I need to make
it bootable using fdisk or some such?

Not that I recall - a simple dd of the iso onto a usb stick just works
see
https://wiki.centos.org/HowTos/InstallFromUSBkey


some USB sticks don't seem to like to be boot devices, and I've never
figured out why.   Sandisk stuff generally seems to work, and most all
my current USB sticks are Sandisk Ultra Fit (the really tiny ones,
typically in 16GB or 32GB).




I've had excellent luck with the 16 GB Mushkin atom - and they are fast 
too, really fast, I suspect some USB 3 thumb drives are really only USB 
2 and there will eventually be a lawsuit. But the Mushkin are really fast.

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Re: [CentOS-es] Distribución Linux OT

[David González Romero]

Existe una llamada ClearOS basada en RedHat pero a mi parecer muy pesada.

El día 13 de octubre de 2016, 15:47, José María Terry Jiménez
 escribió:
> No es Linux pero casi (FreeBSD): pfSense
>
>
> El 13/10/16 a las 20:46, César Martinez escribió:
>>
>> Saludos amigos Listeros espero que todos son encuentren bien, quería
>> preguntar si de pronto alguien conoce alguna distribución basada en Linux
>> que permita hacer balanceo de carga con dos proveedores distintos,
>> segmentación del ancho de banda,  y hot spoot, o si existen estos servicios
>> como complementos para adaptar a un centos 7.x
>>
>> De antemano gracias a todos
>>
>>
>
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Re: [CentOS] CentOS on new Dell

[John R Pierce]

On 10/13/2016 7:10 PM, Rob Kampen wrote:

Mmn, that didn't work. I dd'd the latest Fedora Live iso onto a USB
drive, put it into a brand spanking new Dell Latitude E7470, hit F12
at Dell logo and got "Selected boot device failed". Do I need to make
it bootable using fdisk or some such?
Not that I recall - a simple dd of the iso onto a usb stick just works 
see

https://wiki.centos.org/HowTos/InstallFromUSBkey


some USB sticks don't seem to like to be boot devices, and I've never 
figured out why.   Sandisk stuff generally seems to work, and most all 
my current USB sticks are Sandisk Ultra Fit (the really tiny ones, 
typically in 16GB or 32GB).



--
john r pierce, recycling bits in santa cruz

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Re: [CentOS] CentOS on new Dell

[Rob Kampen]

On 14/10/16 14:03, Michael B Allen wrote:

On Thu, Sep 29, 2016 at 9:18 PM, John R Pierce  wrote:

On 9/29/2016 5:55 PM, Michael B Allen wrote:

It seems optical drives are gone. Do I boot the iso from USB or what's
the procedure now?

yup, put iso on USB, go to town.

Mmn, that didn't work. I dd'd the latest Fedora Live iso onto a USB
drive, put it into a brand spanking new Dell Latitude E7470, hit F12
at Dell logo and got "Selected boot device failed". Do I need to make
it bootable using fdisk or some such?

Not that I recall - a simple dd of the iso onto a usb stick just works see
 https://wiki.centos.org/HowTos/InstallFromUSBkey

Mike
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Re: [CentOS] CentOS on new Dell

[Michael B Allen]

On Thu, Sep 29, 2016 at 9:18 PM, John R Pierce  wrote:
> On 9/29/2016 5:55 PM, Michael B Allen wrote:
>>
>> It seems optical drives are gone. Do I boot the iso from USB or what's
>> the procedure now?
>
> yup, put iso on USB, go to town.

Mmn, that didn't work. I dd'd the latest Fedora Live iso onto a USB
drive, put it into a brand spanking new Dell Latitude E7470, hit F12
at Dell logo and got "Selected boot device failed". Do I need to make
it bootable using fdisk or some such?

Mike
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Re: [CentOS-es] Distribución Linux OT

[Mauricio Tapia]

Hola podrías considerar pfsense... saludos

El jueves, 13 de octubre de 2016, César Martinez <
cmarti...@servicomecuador.com> escribió:

> Saludos amigos Listeros espero que todos son encuentren bien, quería
> preguntar si de pronto alguien conoce alguna distribución basada en Linux
> que permita hacer balanceo de carga con dos proveedores distintos,
> segmentación del ancho de banda,  y hot spoot, o si existen estos servicios
> como complementos para adaptar a un centos 7.x
>
> De antemano gracias a todos
>
>
> --
> |Saludos Cordiales
> |César Martínez M. | Ingeniero de Sistemas
> |Proyectos Software Libre| SERVICOM
> |Tel: (593-2)554-271 2221-386 | Ext 4501
> |Celular:(593 999374317 |Skype servicomecuador
> |Web www.servicomecuador.com Síguenos en:
> |Twitter: @servicomecuador |Facebook: servicomec
> |Zona Clientes: www.servicomecuador.com/billing
> |Blog: http://servicomecuador.com/blog
> |Dir. Av. 10 de Agosto N29-140 Entre
> |Acuña y  Cuero y Caicedo
> |Quito - Ecuador - Sudamérica
>
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>


-- 
Atentamente
Mauricio Tapia Ortega
*atacamaworkbench.com *
Skype : atacamaworkbench
Twitter : @AtacamaWB
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Re: [CentOS] gigE -> 100Mb problems

[John R Pierce]

On 10/13/2016 6:32 PM, John R Pierce wrote:



What driver is being used `ethtool -i eth#`?


e1000m 


arrgh, typed too fast.   e1000e 

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Re: [CentOS] gigE -> 100Mb problems

[John R Pierce]

On 10/13/2016 5:57 PM, Steven Tardy wrote:

On Oct 12, 2016, at 12:26 AM, John R Pierce  wrote:

the switch ports kept going offline on us.

Not finding anything exactly like this... Closest I could find is CSCuu81949

Open a Cisco TAC case and upload a Nexus 9000 tech support (`tac-pac`) to 
investigate further.

Is "port security" enabled on these ports?


I don't know, asking LAN operations


Does this port double as a LOM/IPMI port?


no, boards have dedicated IPMI port, which doesn't go offline


What driver is being used `ethtool -i eth#`?


e1000m


Any OS bonding?


no


Any switch port-channel/vPC?


I don't believe so.


That NIC chipset is a few years old so it's not like that NIC/OS/switch is a 
combo that hasn't been tried/tested.


yeah, about as bog stock normal a config as I've seen.

--
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Re: [CentOS] gigE -> 100Mb problems

[Steven Tardy]

> On Oct 12, 2016, at 12:26 AM, John R Pierce  wrote:
> 
> the switch ports kept going offline on us.

Not finding anything exactly like this... Closest I could find is CSCuu81949

Open a Cisco TAC case and upload a Nexus 9000 tech support (`tac-pac`) to 
investigate further.

Is "port security" enabled on these ports?
Does this port double as a LOM/IPMI port?
What driver is being used `ethtool -i eth#`?
Any OS bonding?
Any switch port-channel/vPC?

That NIC chipset is a few years old so it's not like that NIC/OS/switch is a 
combo that hasn't been tried/tested.
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Re: [CentOS] [SOLVED] Re: Backup Suggestion on C7

[Keith Keller]

On 2016-10-12, Alice Wonder  wrote:
> I'm sure some people will tell me I'm doing it wrong but I always just 
> use rsync for backups, automated in cron.

You're doing it wrong.  ;-)

You're not really doing it ''wrong'', it just depends on what your needs
are.  One drawback to using just rsync is, if a user deletes a file,
then needs it back after the rsync was run again, the file may no longer
be in your backups (similar if the user modified it and needs the original
pre-mod file back).  If you're okay with that, then rsync is fine for
your needs.

rsnapshot uses rsync with hard links to be able to efficiently keep
snapshots (not point-in-time snapshots, just whatever was present when
rsync sync'd each file) on a periodic basis.  bacula is a more
sophisticated method for doing this efficiently across multiple hosts.
LVM snapshots allow for a real point-in-time snapshot (which can then be
backed up with your favorite tool).

> I may be doing it wrong but it always works.

It always works until it doesn't.  This is unfortunately all too true
when it comes to backups.  It's easier to inspect backups on disk than
when they used to be done to tape, but it's still good to verify them
outside of your normal backup routine periodically.

--keith


-- 
kkel...@wombat.san-francisco.ca.us


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Re: [CentOS] Backup Suggestion on C7

[J Martin Rushton]

Mark has asked me to forward this to the list:
-%<-
Subject: Re: [CentOS] Backup Suggestion on C7
Date: Thu, 13 Oct 2016 17:09:41 -0400
From: m.r...@5-cent.us
To: J Martin Rushton 

Please forward to the CentOS list - my hosting provider claims they been
working with SORBS, but it's now been blocking me from posting for two
weeks

J Martin Rushton wrote:
> I'm not a bacula expert, but have had 30+ years in the industry doing
> backups.  I'm a little concerned about what you are planning.  As I
> understand it you are going to be keeping just one copy of each machine
> on a disk attached to the server.  This will help if you loose the
> running disks (though it is hardly backup in depth), but what happens if
> you loose the server due to fire, flood, electrical problems, theft or
> even plain old dropping it?  In general you should aim for multiple
> backup copies; are you willing to bet the company's future on one
> untried copy?  You should ensure that the backup copies are held
> preferably off site, failing that in a separate building, or else in a
> secure fireproof strongbox.

To start, is the OP doing disaster recovery backups, or archive backups?
The difference is the former you only keep for a limited amount of time,
and the later forever.

If the former: first, you should not be backing up one server to its own
disks. The backup should reside on a different server. Secondly, consider
an offline backup. Here at work, we use a home-grown rsync solution (with
hard links), and typically save those for five weeks. We also back up the
backups to either offline disks (mounted in hot swap bays, and they reside
the rest of the time in a fire safe; for things that one fit on one disk,
they're backed up to a server in another building with a large RAID.

For the latter, which I have not been involved with, you should probably
have x weeks, then save the weeklies for x months, then the montlies for x
years. And *ALL* of that should be offsite.

   mark, hoping this gets through
--%<



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Re: [CentOS] Hint for nslookup wanted ...

[Peter]

>> From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On
>> Behalf Of Walter H.
>> Sent: Tuesday, October 11, 2016 9:05 AM
>>
>> has anybody a hint for me, how I can use nslookup to get
>> either IPv6  only or both A and  entries when doing this:

Don't use nslookup:
http://web.archive.org/web/20160304065708/http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/nslookup-flaws.html
http://groups.google.com/group/comp.protocols.dns.bind/msg/6de73c9eaa37137f
http://groups.google.com/group/comp.protocols.dns.bind/msg/39ffce8e8510b9cc

...use dig instead.


Peter
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Re: [CentOS] Disable hybernate/suspend in CentOS 7

[Valeri Galtsev]

On Thu, October 13, 2016 11:55 am, Mike - st257 wrote:
> On Thu, Oct 13, 2016 at 11:33 AM, Valeri Galtsev
> 
> wrote:
>
>> Dear Experts,
>>
>> Could someone point me in the right direction: how can I disable
>> hybernate/suspend in CentOS 7?
>>
>> I get workstations for graduate students with decent amount of RAM (32
>> GB), and for machines with large RAM I either do not have swap at all of
>> have some small (4 GB) swap. As I remember from older manuals, one has
>> to
>> have at least twice amount of swap compared to physical RAM for
>> hybernate/suspend to work. This probably is what bit me: new Dells came
>> with keyboard that has sleep button, when one hits that button the
>> machine
>> locks up. (it stays powered on, does not respond mouse, keyboard, does
>> not
>> respond ping).
>>
>> I would like to disable that sleep button on keyboard. (I'm kind of
>> trying
>> to avoid replacing keyboard with the ones that do not have "sleep" key).
>>
>
> Have you tried disabling power management via GRUB options?
> http://askubuntu.com/a/130541
>

Mike, thanks! You gave me good enough push into right direction, thanks to
which I solved my problem.

Disabling power management via GRUB (boot) options didn't help me. I went
further along these lines, tried to tweak related stuff in
/etc/systemd/login.conf (systemd experts will probably lough, I'm not one,
so... ;-) - didn't help either. I finally came to doing what helped me:
edited

/usr/share/polkit-1/actions/org.freedesktop.login1.policy

(replaced "yes" with "no" in a few related places). This solved my
problem. I'm not posting what exactly I changed, as I overdid it (disabled
locally logged in user's ability to reboot/poweroff machine, and the same
from gdm loging screen - I will need to restore these).

Thanks!
Valeri

>
>>
>> Thanks a lot for all your help!
>>
>> Valeri
>>
>> 
>> Valeri Galtsev
>> Sr System Administrator
>> Department of Astronomy and Astrophysics
>> Kavli Institute for Cosmological Physics
>> University of Chicago
>> Phone: 773-702-4247
>> 
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>
>
>
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> //  SilverTip257  //
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Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Backup Suggestion on C7

[J Martin Rushton]

I'm not a bacula expert, but have had 30+ years in the industry doing
backups.  I'm a little concerned about what you are planning.  As I
understand it you are going to be keeping just one copy of each machine
on a disk attached to the server.  This will help if you loose the
running disks (though it is hardly backup in depth), but what happens if
you loose the server due to fire, flood, electrical problems, theft or
even plain old dropping it?  In general you should aim for multiple
backup copies; are you willing to bet the company's future on one
untried copy?  You should ensure that the backup copies are held
preferably off site, failing that in a separate building, or else in a
secure fireproof strongbox.

Start by assuming you come into work one day to find the building burnt
out and collapsed.  Now work out how to rebuild your system on new kit
on another site and you'll find that you define your backup needs.

Regards,
Martin

On 12/10/16 12:54, Alessandro Baggi wrote:
> Hi list,
> I'm building a backup server for 3 hosts (1 workstation, 2 server). I
> will use bacula to perform backups. The backup is performed on disks (2
> x 3TB on mdraid mirror) and for each hosts I've created a logical volume
> with related size.
> 
> This 3 hosts have different data size with different disk change rate.
> Each host must have a limited sized resource and a reserved space. If a
> server needs more space to perform backup, It must be enabled and
> provisioned.
> 
> My first solution was put each host pools on different logical volumes,
> like:
> 
> host1 -> lv1
> host2 -> lv2
> host3 -> lv3
> 
> and store pools/volumes on specified storage daemon that uses a
> specified device for each different hosts.
> 
> host1 -> storage1 -> device_lv1
> host2 -> storage2 -> device_lv2
> host3 -> storage3 -> device_lv3
> 
> 
>  Unfortunately, I can't define on bacula-sd.conf multiple storage
> definition but only multiple devices. To use different storage I must
> run 3 bacula-sd on same host (I can?), run a bacula-sd on a vm/host.
> Ah, I must use only one physical server.
> 
> With one single machine and the current state I can't use multiple
> storage daemons.
> 
> There are other ways to store host volumes on different devices?
> 
> My second solution was, use only one storage daemon (on the same host)
> with a single device LVM over mdraid, create pool for each hosts and
> limit the size for each volumes on related pool.
> 
> Suggestions?
> 
> Thanks in advance.
> 
> 
> 
> 
> 
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Re: [CentOS-es] Distribución Linux OT

[José María Terry Jiménez]

No es Linux pero casi (FreeBSD): pfSense


El 13/10/16 a las 20:46, César Martinez escribió:
Saludos amigos Listeros espero que todos son encuentren bien, quería 
preguntar si de pronto alguien conoce alguna distribución basada en 
Linux que permita hacer balanceo de carga con dos proveedores 
distintos,  segmentación del ancho de banda,  y hot spoot, o si 
existen estos servicios como complementos para adaptar a un centos 7.x


De antemano gracias a todos




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[CentOS-es] Distribución Linux OT

[César Martinez]

Saludos amigos Listeros espero que todos son encuentren bien, quería 
preguntar si de pronto alguien conoce alguna distribución basada en 
Linux que permita hacer balanceo de carga con dos proveedores 
distintos,  segmentación del ancho de banda,  y hot spoot, o si existen 
estos servicios como complementos para adaptar a un centos 7.x


De antemano gracias a todos


--
|Saludos Cordiales
|César Martínez M. | Ingeniero de Sistemas
|Proyectos Software Libre| SERVICOM
|Tel: (593-2)554-271 2221-386 | Ext 4501
|Celular:(593 999374317 |Skype servicomecuador
|Web www.servicomecuador.com Síguenos en:
|Twitter: @servicomecuador |Facebook: servicomec
|Zona Clientes: www.servicomecuador.com/billing
|Blog: http://servicomecuador.com/blog
|Dir. Av. 10 de Agosto N29-140 Entre
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|Quito - Ecuador - Sudamérica

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Re: [CentOS] Disable hybernate/suspend in CentOS 7

[Ned Slider]

On 13/10/16 16:33, Valeri Galtsev wrote:

Dear Experts,

Could someone point me in the right direction: how can I disable
hybernate/suspend in CentOS 7?

I get workstations for graduate students with decent amount of RAM (32
GB), and for machines with large RAM I either do not have swap at all of
have some small (4 GB) swap. As I remember from older manuals, one has to
have at least twice amount of swap compared to physical RAM for
hybernate/suspend to work. This probably is what bit me: new Dells came
with keyboard that has sleep button, when one hits that button the machine
locks up. (it stays powered on, does not respond mouse, keyboard, does not
respond ping).

I would like to disable that sleep button on keyboard. (I'm kind of trying
to avoid replacing keyboard with the ones that do not have "sleep" key).

Thanks a lot for all your help!

Valeri



You should be able to do this with PolicyKit:

https://access.redhat.com/solutions/33954

This solution is for RHEL6, but the same polkit rule should work on RHEL7.


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Re: [CentOS] Disable hybernate/suspend in CentOS 7

[Mike - st257]

On Thu, Oct 13, 2016 at 11:33 AM, Valeri Galtsev 
wrote:

> Dear Experts,
>
> Could someone point me in the right direction: how can I disable
> hybernate/suspend in CentOS 7?
>
> I get workstations for graduate students with decent amount of RAM (32
> GB), and for machines with large RAM I either do not have swap at all of
> have some small (4 GB) swap. As I remember from older manuals, one has to
> have at least twice amount of swap compared to physical RAM for
> hybernate/suspend to work. This probably is what bit me: new Dells came
> with keyboard that has sleep button, when one hits that button the machine
> locks up. (it stays powered on, does not respond mouse, keyboard, does not
> respond ping).
>
> I would like to disable that sleep button on keyboard. (I'm kind of trying
> to avoid replacing keyboard with the ones that do not have "sleep" key).
>

Have you tried disabling power management via GRUB options?
http://askubuntu.com/a/130541


>
> Thanks a lot for all your help!
>
> Valeri
>
> 
> Valeri Galtsev
> Sr System Administrator
> Department of Astronomy and Astrophysics
> Kavli Institute for Cosmological Physics
> University of Chicago
> Phone: 773-702-4247
> 
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//  SilverTip257  //
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[CentOS] Disable hybernate/suspend in CentOS 7

[Valeri Galtsev]

Dear Experts,

Could someone point me in the right direction: how can I disable
hybernate/suspend in CentOS 7?

I get workstations for graduate students with decent amount of RAM (32
GB), and for machines with large RAM I either do not have swap at all of
have some small (4 GB) swap. As I remember from older manuals, one has to
have at least twice amount of swap compared to physical RAM for
hybernate/suspend to work. This probably is what bit me: new Dells came
with keyboard that has sleep button, when one hits that button the machine
locks up. (it stays powered on, does not respond mouse, keyboard, does not
respond ping).

I would like to disable that sleep button on keyboard. (I'm kind of trying
to avoid replacing keyboard with the ones that do not have "sleep" key).

Thanks a lot for all your help!

Valeri


Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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Re: [CentOS] Flash player beta

[isdtor]

 
> FYI, this has been reported on the Adobe "Flash Player Beta Channel" forum,
> and I've +1ed it. I would suggest doing the same to add some more pressure
> on them.
> 
> 
> https://forums.adobe.com/thread/2209127   (Adobe sign-in required)
 
I didn't see anything in the release notes, but the current release is working 
now on 6.8. Looks like they were listening.

It doesn't change my opinion about luser corporations who think it's ok to 
build a flash-based management interface for their wares (looking at you, 
VMware).

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