[gentoo-user] Control /bin/cp default behavior

[Florian Philipp]

Hi list!

I just noticed that cp doesn't use btrfs' capabilities to do lazy copies
(a.k.a. copy on write) unless you specify --reflink=auto.

For my console needs, I could specify an alias but I don't see why
scripts shouldn't use the option as well. Is there an environment
variable to control cp like there is for less, gzip and friends?

Thanks in advance!
Florian Philipp



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Re: [gentoo-user] Hard drive change

[Volker Armin Hemmann]

Am Donnerstag, 8. November 2012, 16:23:08 schrieb mindrunner:
> i always use ddrescue for migrating to another hdd.
> it is much more comfortable than dd and does not depent on file
> systems, etc.
> I always prefer copying on block device level.

that is just stupid. You copy the fragmentation, the errors, the journal log 
and all the other crap that accumulated over time. No excuses. Just dumb.


-- 
#163933

Re: [gentoo-user] Hard drive change

[john]

On Thu, 08 Nov 2012 19:17:25 +0100
Florian Philipp  wrote:

> Am 08.11.2012 17:37, schrieb Paul Hartman:
> > On Thu, Nov 8, 2012 at 7:03 AM, Volker Armin Hemmann
> >  wrote:
> >> Am 08.11.2012 12:12 schrieb :
> >>
> >>> I am about to change my hard drive on my machine from a 500GB to
> >>> 2tb.
> >>>
> >>> To transfer I  intend to dd the partitions across and then resize
> >>> using lvm as home swap var are located on lvm.
> >>>
> >>> Is this the right approach or would you recommend another method?
> >>>
> >>> John D Maunder.
> >>
> >> 2tb drive  probably different sector size. cp -auv recommended.
> >>
> > 
> > I agree, best approach is to partition and format the new drive as
> > new, and then copy the files. This will also help you start your new
> > disk with a lack of fragmentation.
> > 
> 
> +1
> 
> Of course, a simple cp -auv /* /new_root won't suffice because of
> proc, sys and friends. I prefer
> mount --bind / /real_root
> cp -auv /real_root/* /new_root
> 
> Regards,
> Florian Philipp
> 

Thanks all for advice. Nice work with the mounting.



 

-- 
John D Maunder

Re: [gentoo-user] genkernel compile only one new module

[Mark David Dumlao]

make was specifically designed so that by default, it would only compile
things whose dependencies had changed since last run.

If your kernel config had not selected the object before, and all you do is
add it as a module, then when you rerun make, only that module should be
recompiled. However if you do built-in to module or vice versa, you're out
of luck.
On Nov 9, 2012 12:58 AM, ifj. Stefán István  wrote:

> Hello!
>
> I have a quite good kernel, but today I realised that I need a kernel
> module that hadn't been compiled before.
> Is there any way to compile only that new module, and not compiling the
> whole kernel and all of the modules again?
>
> Thanks,
> István
>
>

Re: [gentoo-user] Hard drive change

[mindrunner]

I never payed attention to this. all i know is that the alignment is
correct. (checked with parted)


On 11/08/2012 04:37 PM, Neil Bothwick wrote:
> On Thu, 08 Nov 2012 16:23:08 +0100, mindrunner wrote:
> 
>> i always use ddrescue for migrating to another hdd.
>> it is much more comfortable than dd and does not depent on file
>> systems, etc.
>> I always prefer copying on block device level.
> 
> Even when the two devices have different block sizes?
> 
> At best you'd get crap performance from misaligned filesystem boundaries.
> 
> 

Re: [gentoo-user] genkernel compile only one new module

[mindrunner]

Why exactly would you do this? Just because of saving time?
If you do not clean kernel dir, it will compile very fast.

On 11/08/2012 07:02 PM, Bruce Hill wrote:
> On Thu, Nov 08, 2012 at 06:55:31PM +0100, "ifj. Stefán István"
> wrote:
>> Hello!
>>
>> I have a quite good kernel, but today I realised that I need a
>> kernel module that hadn't been compiled before. Is there any way
>> to compile only that new module, and not compiling the whole
>> kernel and all of the modules again?
>>
>> Thanks, István
>
> make nconfig (or menuconfig or whatever-config) select M for the
> module exit and save make && make modules_install will put the
> module into /lib/modules/`uname -r`/build/ then you can "modprobe
> " and it will be in use.
>
> You should go ahead and install that new kernel and edit your
> bootloader as needed.
>
> Bruce
>

Re: [gentoo-user] Hard drive change

[Florian Philipp]

Am 08.11.2012 17:37, schrieb Paul Hartman:
> On Thu, Nov 8, 2012 at 7:03 AM, Volker Armin Hemmann
>  wrote:
>> Am 08.11.2012 12:12 schrieb :
>>
>>> I am about to change my hard drive on my machine from a 500GB to 2tb.
>>>
>>> To transfer I  intend to dd the partitions across and then resize using
>>> lvm as home swap var are located on lvm.
>>>
>>> Is this the right approach or would you recommend another method?
>>>
>>> John D Maunder.
>>
>> 2tb drive  probably different sector size. cp -auv recommended.
>>
> 
> I agree, best approach is to partition and format the new drive as
> new, and then copy the files. This will also help you start your new
> disk with a lack of fragmentation.
> 

+1

Of course, a simple cp -auv /* /new_root won't suffice because of proc,
sys and friends. I prefer
mount --bind / /real_root
cp -auv /real_root/* /new_root

Regards,
Florian Philipp



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Re: [gentoo-user] genkernel compile only one new module

[Bruce Hill]

On Thu, Nov 08, 2012 at 06:55:31PM +0100, "ifj. Stefán István" wrote:
> Hello!
> 
> I have a quite good kernel, but today I realised that I need a kernel 
> module that hadn't been compiled before.
> Is there any way to compile only that new module, and not compiling the 
> whole kernel and all of the modules again?
> 
> Thanks,
> István

make nconfig (or menuconfig or whatever-config)
select M for the module
exit and save
make && make modules_install
will put the module into /lib/modules/`uname -r`/build/
then you can "modprobe "
and it will be in use.

You should go ahead and install that new kernel and edit your bootloader as
needed.

Bruce
-- 
Happy Penguin Computers   >')
126 Fenco Drive   ( \
Tupelo, MS 38801   ^^
supp...@happypenguincomputers.com
662-269-2706 662-205-6424
http://happypenguincomputers.com/

Don't top-post: http://en.wikipedia.org/wiki/Top_post#Top-posting

[gentoo-user] genkernel compile only one new module

[ifj. Stefán István]

Hello!

I have a quite good kernel, but today I realised that I need a kernel 
module that hadn't been compiled before.
Is there any way to compile only that new module, and not compiling the 
whole kernel and all of the modules again?


Thanks,
István

Re: [gentoo-user] Hard drive change

[Paul Hartman]

On Thu, Nov 8, 2012 at 7:03 AM, Volker Armin Hemmann
 wrote:
> Am 08.11.2012 12:12 schrieb :
>
>> I am about to change my hard drive on my machine from a 500GB to 2tb.
>>
>> To transfer I  intend to dd the partitions across and then resize using
>> lvm as home swap var are located on lvm.
>>
>> Is this the right approach or would you recommend another method?
>>
>> John D Maunder.
>
> 2tb drive  probably different sector size. cp -auv recommended.
>

I agree, best approach is to partition and format the new drive as
new, and then copy the files. This will also help you start your new
disk with a lack of fragmentation.

Re: [gentoo-user] Hard drive change

[Neil Bothwick]

On Thu, 08 Nov 2012 16:23:08 +0100, mindrunner wrote:

> i always use ddrescue for migrating to another hdd.
> it is much more comfortable than dd and does not depent on file
> systems, etc.
> I always prefer copying on block device level.

Even when the two devices have different block sizes?

At best you'd get crap performance from misaligned filesystem boundaries.


-- 
Neil Bothwick

Top Oxymorons Number 10: Computer security


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Re: [gentoo-user] Hard drive change

[mindrunner]

i always use ddrescue for migrating to another hdd.
it is much more comfortable than dd and does not depent on file
systems, etc.
I always prefer copying on block device level.


On 11/08/2012 03:12 PM, Srdjan Rakic wrote:
> I used rsync for that.
>
> On Thu, Nov 8, 2012 at 8:03 AM, Volker Armin Hemmann
> mailto:volkerar...@googlemail.com>>
> wrote:
>
> 2tb drive  probably different sector size. cp -auv recommended.
>
> Am 08.11.2012 12:12 schrieb  >:
>
> I am about to change my hard drive on my machine from a 500GB to
> 2tb.
>
> To transfer I  intend to dd the partitions across and then resize
> using lvm as home swap var are located on lvm.
>
> Is this the right approach or would you recommend another method?
>
> John D Maunder.
>
>
>
>
>
>
>
>

Re: [gentoo-user] Hard drive change

[Neil Bothwick]

On Thu, 8 Nov 2012 14:03:08 +0100, Volker Armin Hemmann wrote:

> 2tb drive  probably different sector size. cp -auv recommended.

Very good point. Use cp, rsync, tar or lvm tools, in fact anything but dd.


-- 
Neil Bothwick

Like an atheist in a grave: all dressed up and no place to go.


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Re: [gentoo-user] Re: Revdep-rebuild: ams won't start due to shared library libclalsadrv.so.1

[Frank Steinmetzger]

On Wed, Nov 07, 2012 at 01:08:37PM +0100, Frank Steinmetzger wrote:
> On Tue, Nov 06, 2012 at 05:56:12PM -0800, walt wrote:
> 
> > > Hello
> > > […]
> > > $ ams
> > > ams: error while loading shared libraries: libclalsadrv.so.1: cannot open
> > > shared object file: No such file or directory
> > […]
> […]


Summarising:

$ lddtree /usr/bin/ams
ams => /usr/bin/ams (interpreter => /lib64/ld-linux-x86-64.so.2)
[...]
libclalsadrv.so.1 => not found
[...]


$ qlist libclalsadrv
/usr/share/doc/libclalsadrv-1.2.2/AUTHORS.bz2
/usr/include/clalsadrv.h
/usr/lib64/libclalsadrv.so
/usr/lib64/libclalsadrv.so.1.2.2


I’d like to file a bug report.  But which one is the culprit in your opinion;
libclalsadrv for not providing a .so.1 link, or ams for stubbornly referencing
it in its executable?  Of course the ams build log simply says for the linking:

x86_64-pc-linux-gnu-g++  ...  -lclalsadrv  ...

I’m just asking because I have a habit of making a fool of myself by reporting
stuff that turned out to be my own mistake or missing the point by a mile. :-/
-- 
Gruß | Greetings | Qapla'
Please do not share anything from, with or about me with any Facebook service.

I used to be vain, but now I know that I am beautiful.


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Re: [gentoo-user] Hard drive change

[Srdjan Rakic]

I used rsync for that.

On Thu, Nov 8, 2012 at 8:03 AM, Volker Armin Hemmann <
volkerar...@googlemail.com> wrote:

> 2tb drive  probably different sector size. cp -auv recommended.
> Am 08.11.2012 12:12 schrieb :
>
> I am about to change my hard drive on my machine from a 500GB to 2tb.
>>
>> To transfer I  intend to dd the partitions across and then resize using
>> lvm as home swap var are located on lvm.
>>
>> Is this the right approach or would you recommend another method?
>>
>> John D Maunder.
>>
>>
>>
>>
>>
>>
>>
>>

Re: [gentoo-user] DHCP - specific inet no - how to

[J. Roeleveld]

On Thursday, November 08, 2012 12:13:56 PM Helmut Jarausch wrote:
> On 11/08/2012 09:45:34 AM, Neil Bothwick wrote:
> > On Thu, 08 Nov 2012 09:18:35 +0100, Andrea Conti wrote:
> > > > Normally, a device tries to get the previous inet number, but
> > > > sometime this changes.
> > > 
> > > DHCP clients can neither request nor suggest a specific IP address,
> > 
> > so
> > 
> > > they don't "try to get" anything. It's just the DHCP server giving
> > 
> > out
> > 
> > > the previous IP to the same client, either by chance or because the
> > > existing lease hasn't expired yet.
> > 
> > dhcpcd has a --resquest option to do just this. It only works if the
> > address is available and if the server is returning a different
> > address
> > now it may be that your preferred address is in use.
> > 
> > Have you considered running a local DHCP server, like dnsmasq?
> 
> Thanks Neil!
> I have router (provided by my internet provider) which can be accessed
> by WLAN.
> Since I cannot modify/configure this router how can I make use of
> dnsmasq ?
> 
> Helmut.

Are you not able to use your own router?

Being able to configure the DHCP and NAT-configuration of the router is often 
required to get certain software to work. There are multi-player games that 
need ports forwarded to be able to play with other people over the internet. 
(Just to name a common scenario)

--
Joost

Re: [gentoo-user] Hard drive change

[Volker Armin Hemmann]

2tb drive  probably different sector size. cp -auv recommended.
Am 08.11.2012 12:12 schrieb :

> I am about to change my hard drive on my machine from a 500GB to 2tb.
>
> To transfer I  intend to dd the partitions across and then resize using
> lvm as home swap var are located on lvm.
>
> Is this the right approach or would you recommend another method?
>
> John D Maunder.
>
>
>
>
>
>
>
>

Re: [gentoo-user] uefi gpt grub2

[Randolph Maaßen]

2012/11/8 

> Over the last few days I have tried to set up using uefi gpt and grub2.
> After many hours of frustration I have gone back to grub legacy and mbr.
>
> I followed the Gentoo wiki  and Arch wiki and several other sources of
> which I failed miserably. Is this technology fairly unreliable? I booted
> from a uefi enabled usb stick but still fell over. Is this ready for
> mainstream or
>  still alpha like?
>
> Also does ufibootmgr change motherboard firmware? Somehow this feels
> wrong if the case.
>
> John D Maunder
>
>
>
>
>
>
Hi,

I tried installing UEFI GPT too a few months ago, but I had a semi success.
After some days of fiddeling around with parameters and variables I could
boot the system, but I can't see the kernel output or open-rc. But the X
loads and the system works after that like normal, but without the textual
ttys. terminal emulations like xterm or so work. So I would install it
again, but it isn't as easy as thought.


-- 
Mit freundlichen Grüßen / Best regards

Randolph Maaßen

Re: [gentoo-user] More file system frustration

[William Kenworthy]

On Thu, 2012-11-08 at 10:58 +, Kerin Millar wrote:
> William Kenworthy wrote:
> > If I try and do:
> >
> > moriah ~ # mount -t ceph 192.168.44.68:6789:/ /mnt/ceph -o users
> > mount error 22 = Invalid argument
> >
> 
> Specifying "users" in that context doesn't make sense. Try creating an 
> entry in /etc/fstab. For example:
> 
> 192.168.44.68:6789://mnt/cephcephusers0 0
> 
> Then see if you can mount by its mountpoint:
> 
> $ mount /mnt/ceph
> 
> > It turns out the driver doesnt recognise the user or users mount option
> > and gentoo wont let a user mount or access a root mount, or even let a
> > user mount.  Tried adding the user to the disk group without any effect.
> >
> 
> It's not a driver option. /bin/mount is suid root and refers to fstab to 
> decide whether a non-root user should be allowed to mount.
> 
> Generally speaking, regular user accounts should not be added to the 
> disk group. That provides raw read/write access to block device nodes 
> such as dev/sda, which is a potential risk both in terms of safety and 
> security.
> 
> > Something in gentoo's user access control is causing this problem I
> > think, so how can I get around it?
> >
> > BillK
> >
> >

Thanks Kerin, but that has the same problem - but it did allow me to
chown the mount point so its usable/testable by users.

BillK

Re: [gentoo-user] Hard drive change

[jdm]

Neil Bothwick  wrote :

> On Thu, 08 Nov 2012 11:08:18 +, j...@jdm.myzen.co.uk
> wrote:
> 
> > I am about to change my hard drive on my machine from a 500GB to 2tb.
> > 
> > To transfer I  intend to dd the partitions across and then resize using
> > lvm as home swap var are located on lvm.
> 
> Can you connect both drives ate the same time? If so you can create a PV
> on the new drive, add it to your VG and then use lvmove to move the date
> before removing the old drive from the VG. That way you can continue to
> use the computer while the transfer takes place.
> 
> 
> -- 
> Neil Bothwick
> 
> How do I set my laser printer to stun?

Yes I can connect to both drives at the same time. My root partition is not on 
lvm. This sounds like an excellent idea. Thanks.

Fairly new to lvm but it seems very solid and capable

Re: [gentoo-user] Hard drive change

[Neil Bothwick]

On Thu, 08 Nov 2012 11:08:18 +, j...@jdm.myzen.co.uk wrote:

> I am about to change my hard drive on my machine from a 500GB to 2tb.
> 
> To transfer I  intend to dd the partitions across and then resize using
> lvm as home swap var are located on lvm.

Can you connect both drives ate the same time? If so you can create a PV
on the new drive, add it to your VG and then use lvmove to move the date
before removing the old drive from the VG. That way you can continue to
use the computer while the transfer takes place.


-- 
Neil Bothwick

How do I set my laser printer to stun?


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Re: [gentoo-user] DHCP - specific inet no - how to

[Neil Bothwick]

On Thu, 08 Nov 2012 12:13:56 +0100, Helmut Jarausch wrote:

> > Have you considered running a local DHCP server, like dnsmasq?  
> 
> I have router (provided by my internet provider) which can be accessed  
> by WLAN.
> Since I cannot modify/configure this router how can I make use of  
> dnsmasq ?

Good question! Can you not even disable the DHCP server in the router?


-- 
Neil Bothwick

Inland Revenue: We've got what it takes to take what you've got!


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[gentoo-user] uefi gpt grub2

[jdm]

Over the last few days I have tried to set up using uefi gpt and grub2. After 
many hours of frustration I have gone back to grub legacy and mbr.

I followed the Gentoo wiki  and Arch wiki and several other sources of which I 
failed miserably. Is this technology fairly unreliable? I booted from a uefi 
enabled usb stick but still fell over. Is this ready for mainstream or 
 still alpha like?

Also does ufibootmgr change motherboard firmware? Somehow this feels 
wrong if the case.

John D Maunder 

Re: [gentoo-user] DHCP - specific inet no - how to

[Helmut Jarausch]

On 11/08/2012 09:45:34 AM, Neil Bothwick wrote:

On Thu, 08 Nov 2012 09:18:35 +0100, Andrea Conti wrote:

> > Normally, a device tries to get the previous inet number, but
> > sometime this changes.
>
> DHCP clients can neither request nor suggest a specific IP address,  
so
> they don't "try to get" anything. It's just the DHCP server giving  
out

> the previous IP to the same client, either by chance or because the
> existing lease hasn't expired yet.

dhcpcd has a --resquest option to do just this. It only works if the
address is available and if the server is returning a different  
address

now it may be that your preferred address is in use.

Have you considered running a local DHCP server, like dnsmasq?


Thanks Neil!
I have router (provided by my internet provider) which can be accessed  
by WLAN.
Since I cannot modify/configure this router how can I make use of  
dnsmasq ?


Helmut.

[gentoo-user] Hard drive change

[jdm]

I am about to change my hard drive on my machine from a 500GB to 2tb.

To transfer I  intend to dd the partitions across and then resize using lvm as 
home swap var are located on lvm.

Is this the right approach or would you recommend another method?

John D Maunder.

Re: [gentoo-user] More file system frustration

[Kerin Millar]

William Kenworthy wrote:

If I try and do:

moriah ~ # mount -t ceph 192.168.44.68:6789:/ /mnt/ceph -o users
mount error 22 = Invalid argument



Specifying "users" in that context doesn't make sense. Try creating an 
entry in /etc/fstab. For example:


192.168.44.68:6789://mnt/cephcephusers0 0

Then see if you can mount by its mountpoint:

$ mount /mnt/ceph


It turns out the driver doesnt recognise the user or users mount option
and gentoo wont let a user mount or access a root mount, or even let a
user mount.  Tried adding the user to the disk group without any effect.



It's not a driver option. /bin/mount is suid root and refers to fstab to 
decide whether a non-root user should be allowed to mount.


Generally speaking, regular user accounts should not be added to the 
disk group. That provides raw read/write access to block device nodes 
such as dev/sda, which is a potential risk both in terms of safety and 
security.



Something in gentoo's user access control is causing this problem I
think, so how can I get around it?

BillK

Re: [gentoo-user] More file system frustration

[Bill Kenworthy]

On Thu, 2012-11-08 at 17:59 +0800, William Kenworthy wrote:
> If I try and do:
> 
> moriah ~ # mount -t ceph 192.168.44.68:6789:/ /mnt/ceph -o users
> mount error 22 = Invalid argument
> 
> It turns out the driver doesnt recognise the user or users mount option
> and gentoo wont let a user mount or access a root mount, or even let a
> user mount.  Tried adding the user to the disk group without any effect.
> 
> Something in gentoo's user access control is causing this problem I
> think, so how can I get around it?
> 
> BillK
> 
> 

I was able to chown the mount so a user can access it - not as flexible
as the normal way but its user accessible.

BillK

[gentoo-user] More file system frustration

[William Kenworthy]

If I try and do:

moriah ~ # mount -t ceph 192.168.44.68:6789:/ /mnt/ceph -o users
mount error 22 = Invalid argument

It turns out the driver doesnt recognise the user or users mount option
and gentoo wont let a user mount or access a root mount, or even let a
user mount.  Tried adding the user to the disk group without any effect.

Something in gentoo's user access control is causing this problem I
think, so how can I get around it?

BillK

Re: [gentoo-user] DHCP - specific inet no - how to

[Neil Bothwick]

On Thu, 08 Nov 2012 09:18:35 +0100, Andrea Conti wrote:

> > Normally, a device tries to get the previous inet number, but
> > sometime this changes.  
> 
> DHCP clients can neither request nor suggest a specific IP address, so
> they don't "try to get" anything. It's just the DHCP server giving out
> the previous IP to the same client, either by chance or because the
> existing lease hasn't expired yet.

dhcpcd has a --resquest option to do just this. It only works if the
address is available and if the server is returning a different address
now it may be that your preferred address is in use.

Have you considered running a local DHCP server, like dnsmasq?


-- 
Neil Bothwick

WinErr 01C: Uncertainty error - Uncertainty may be inadequate.


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Re: [gentoo-user] DHCP - specific inet no - how to

[Helmut Jarausch]

On 11/08/2012 09:18:35 AM, Andrea Conti wrote:

Hello,

> Normally, a device tries to get the previous inet number, but  
sometime this

> changes.

DHCP clients can neither request nor suggest a specific IP address, so
they don't "try to get" anything. It's just the DHCP server giving out
the previous IP to the same client, either by chance or because the
existing lease hasn't expired yet.

> But I cannot configure the DHCP server myself since this is  
provided by

> my internet provider.

Then you're basically out of luck. Since you have few devices and  
those

devices are under your control, just forget about DHCP and configure
them statically.


Thanks!
But I get the nameserver of DHCP, as well. Can this be fetched from  
DHCP since this may change?


From man dhclient
 A DHCP client may request an address from this pool,  and  then
 use  it  on  a temporary basis for communication on network
I've just not found out howto.

Helmut.

Re: [gentoo-user] DHCP - specific inet no - how to

[Andrea Conti]

Hello,

> Normally, a device tries to get the previous inet number, but sometime this
> changes.

DHCP clients can neither request nor suggest a specific IP address, so
they don't "try to get" anything. It's just the DHCP server giving out
the previous IP to the same client, either by chance or because the
existing lease hasn't expired yet.

> But I cannot configure the DHCP server myself since this is provided by
> my internet provider.

Then you're basically out of luck. Since you have few devices and those
devices are under your control, just forget about DHCP and configure
them statically.

andrea