Re: [gentoo-user] Re: linux-headers-3.5 with 3.4 kernel?

[Oszkár Ocsenás]

I totally agree with Q
2012.07.23. 23:15, "»Q«"  ezt írta:

> On Mon, 23 Jul 2012 17:16:41 +0300
> Nikos Chantziaras  wrote:
>
> > Portage now installs sys-kernel/linux-headers-3.5.
> > sys-kernel/gentoo-sources is at 3.4.5.
> >
> > Is it even adviced to do that, installing 3.5 headers and running a
> > 3.4 kernel?  This sounds like a bad idea to me.
>
> As I read the glibc faq, linux-headers are backwards-compatible as far
> as glibc is concerned;  that is, newer linux-headers still have
> everything needed to make glibc work with older kernels.  And I assume
> that holds for other packages which need linux-headers, not just glibc.
>
> Whether my understanding of why is correct or not, the glibc folks do
> recommend using the latest linux-headers, even if your kernel is older.
>
>  links to
> <
> http://sourceware.org/glibc/wiki/FAQ#What_version_of_the_Linux_kernel_headers_should_be_used.3F
> >.
>
>
>

Re: [gentoo-user] OT: How to make mutt open files by *EXTENSION*?

[Terry]

I may be mistaken (away from computer atm) but doesn't mutt use mailcap? I 
believe I use /etc/mailcap but you could also use per user files, 
/home/user/.mailcap to adjust your attachment handling. There's lots of guides 
on the web.

-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity. And my 
typing mistakes. 

Todd Goodman  wrote:

* Walter Dnes  [120723 17:48]:
> My ISP emails invoices+receipts as PDF files. Thay made a change in
> the "mime type" earlier this year that makes things more difficult...
> 
> Before
> ==
> [-- Attachment #2: blah_blah_blah.pdf --]
> [-- Type: application/pdf, Encoding: base64, Size: 47K --]
> 
> [-- application/pdf is unsupported (use 'v' to view this part) --]
> 
> After
> =
> [-- Attachment #2: blah_blah_blah.pdf --]
> [-- Type: application/octet-stream, Encoding: base64, Size: 79K --]
> 
> [-- application/octet-stream is unsupported (use 'v' to view this part) --]
> 
> With "Type: application/pdf" I hit "v" and epdfview brought up the
> document. With "Type: application/octet-stream" I have to save the
> attachment and manually open with epdfview. Mime-type is useless in
> this situation. Is there a way to force the file to be opened based on
> extension rather than mime type?
> 
> -- 
> Walter Dnes 

I think you could use something like mutt.octet.filter (There's a perl
version at http://www.davep.org/mutt/mutt.octet.filter.pl) to handle
application/octet-stream mime types.

It uses file to try to determine the proper type and can then use
whatever is in your mailcap to determine what to run.

It should be pretty easy to extend it to match on filename if you really
wanted to.

Todd

Re: [gentoo-user] OT: How to make mutt open files by *EXTENSION*?

[Todd Goodman]

* Walter Dnes  [120723 17:48]:
>   My ISP emails invoices+receipts as PDF files.  Thay made a change in
> the "mime type" earlier this year that makes things more difficult...
> 
> Before
> ==
> [-- Attachment #2: blah_blah_blah.pdf --]
> [-- Type: application/pdf, Encoding: base64, Size: 47K --]
> 
> [-- application/pdf is unsupported (use 'v' to view this part) --]
> 
> After
> =
> [-- Attachment #2: blah_blah_blah.pdf --]
> [-- Type: application/octet-stream, Encoding: base64, Size: 79K --]
> 
> [-- application/octet-stream is unsupported (use 'v' to view this part) --]
> 
>   With "Type: application/pdf" I hit "v" and epdfview brought up the
> document.  With "Type: application/octet-stream" I have to save the
> attachment and manually open with epdfview.  Mime-type is useless in
> this situation.  Is there a way to force the file to be opened based on
> extension rather than mime type?
> 
> -- 
> Walter Dnes 

I think you could use something like mutt.octet.filter (There's a perl
version at http://www.davep.org/mutt/mutt.octet.filter.pl) to handle
application/octet-stream mime types.

It uses file to try to determine the proper type and can then use
whatever is in your mailcap to determine what to run.

It should be pretty easy to extend it to match on filename if you really
wanted to.

Todd

[gentoo-user] OT: How to make mutt open files by *EXTENSION*?

[Walter Dnes]

  My ISP emails invoices+receipts as PDF files.  Thay made a change in
the "mime type" earlier this year that makes things more difficult...

Before
==
[-- Attachment #2: blah_blah_blah.pdf --]
[-- Type: application/pdf, Encoding: base64, Size: 47K --]

[-- application/pdf is unsupported (use 'v' to view this part) --]

After
=
[-- Attachment #2: blah_blah_blah.pdf --]
[-- Type: application/octet-stream, Encoding: base64, Size: 79K --]

[-- application/octet-stream is unsupported (use 'v' to view this part) --]

  With "Type: application/pdf" I hit "v" and epdfview brought up the
document.  With "Type: application/octet-stream" I have to save the
attachment and manually open with epdfview.  Mime-type is useless in
this situation.  Is there a way to force the file to be opened based on
extension rather than mime type?

-- 
Walter Dnes 

[gentoo-user] Re: linux-headers-3.5 with 3.4 kernel?

[»Q«]

On Mon, 23 Jul 2012 17:16:41 +0300
Nikos Chantziaras  wrote:

> Portage now installs sys-kernel/linux-headers-3.5. 
> sys-kernel/gentoo-sources is at 3.4.5.
> 
> Is it even adviced to do that, installing 3.5 headers and running a
> 3.4 kernel?  This sounds like a bad idea to me.

As I read the glibc faq, linux-headers are backwards-compatible as far
as glibc is concerned;  that is, newer linux-headers still have
everything needed to make glibc work with older kernels.  And I assume
that holds for other packages which need linux-headers, not just glibc.

Whether my understanding of why is correct or not, the glibc folks do
recommend using the latest linux-headers, even if your kernel is older.

 links to 
.

Re: [gentoo-user] linux-headers-3.5 with 3.4 kernel?

[Paul Hartman]

On Mon, Jul 23, 2012 at 3:01 PM, Helmut Jarausch
 wrote:
> On 07/23/2012 04:16:41 PM, Nikos Chantziaras wrote:
>>
>> Portage now installs sys-kernel/linux-headers-3.5.
>> sys-kernel/gentoo-sources is at 3.4.5.
>>
>> Is it even adviced to do that, installing 3.5 headers and running a 3.4
>> kernel?  This sounds like a bad idea to me.
>>
>
> Why are you not using the 3.5.0 kernel (vanilla-sources has it). It contains
> some import fixes.

3.5.0 was not in portage tree last time I did sync a few hours ago. I
guess it is new. :)

[gentoo-user] Re: How can I rewrite all empty sectors with zeros?

[Nikos Chantziaras]

On 23/07/12 19:24, Jarry wrote:

On 23-Jul-12 16:29, Nikos Chantziaras wrote:

On 22/07/12 20:18, Jarry wrote:

Hi,
I want to backup my whole hard-drive (8 partitions) with:
# dd if=/dev/sda | gzip > /path/image.gz

In order to achieve good compression level I'd like to wipe
out all empty space with zeros. How can I do that?


That's the wrong way to do it.  You should use a tool that only copies
the data, and then also backup the partition table.

Or use partimage/clonezilla like Neil mentioned which does all that
automatically.


I know those tools. Unfortunatelly, they do not support
"smart copying" (only used sectors) if software raid is used.

So I'm back on the beginning: I can clone only the whole
drive (all sectors). No matter if I use dd, clonezila or
partimage...


There's good ol' tar too :-)  I usually use that one, or rsync if I need 
to clone rather than back-up and compress.  Those two have never let me 
down yet.

Re: [gentoo-user] linux-headers-3.5 with 3.4 kernel?

[Helmut Jarausch]

On 07/23/2012 04:16:41 PM, Nikos Chantziaras wrote:
Portage now installs sys-kernel/linux-headers-3.5.  
sys-kernel/gentoo-sources is at 3.4.5.


Is it even adviced to do that, installing 3.5 headers and running a  
3.4 kernel?  This sounds like a bad idea to me.




Why are you not using the 3.5.0 kernel (vanilla-sources has it). It  
contains some import fixes.

Helmut.

Re: [gentoo-user] linux-headers-3.5 with 3.4 kernel?

[Paul Hartman]

On Mon, Jul 23, 2012 at 11:46 AM, Florian Philipp  wrote:
> Am 23.07.2012 16:16, schrieb Nikos Chantziaras:
>> Portage now installs sys-kernel/linux-headers-3.5.
>> sys-kernel/gentoo-sources is at 3.4.5.
>>
>> Is it even adviced to do that, installing 3.5 headers and running a 3.4
>> kernel?  This sounds like a bad idea to me.
>>
>>
>
> Honestly, I cannot give you a satisfying explanation, but
>
> a) I came across this:
> http://forums.gentoo.org/viewtopic-t-570319-start-0.html
>
> b) I was told the same years ago and never had issues.
>
> c) until you re-emerge glibc nothing changes anyway.
>
> d) your current glibc won't use new features, anyway (I guess)
>
> e) and even then, forward/backward compatibility in kernel headers and
> glibc are very good.

I have no official information either, but I always mask headers
greater than the version of kernel I'm using right now, just because
it feels wrong to me. there are about two dozen packages on my system
that depend on os-headers or linux-headers, so I don't get comfort
from "basically only glibc cares" statements. But maybe I'm just
worrying for no good reason. :)

Re: [gentoo-user] systemd and gnome3

[Canek Peláez Valdés]

On Mon, Jul 23, 2012 at 4:29 AM, Stefan G. Weichinger  wrote:
>
> (replying to list as I assume this could interest and/or help other
> users as well)
>
> Peter, Canek, how did you approach syslogs?
>
> systemd brings its own journal (readable via systemd-journalctl, learned
> right now) and so it possible to run the box without syslog-ng or similar.
>
> archlinux-wiki tells me how to combine things:
>
> https://wiki.archlinux.org/index.php/Systemd#Systemd_Journal
>
> but I wonder what your solutions/opinions are so far ...

journald is an interesting idea. It allows you (among other things) to
see the messages from a service (and only from that service) in the
status command of systemctl:

# systemctl status sshd.service
sshd.service - SSH Secure Shell Service
  Loaded: loaded (/etc/systemd/system/sshd.service; enabled)
  Active: active (running) since Thu, 12 Jul 2012 21:39:03 -0500; 1
weeks and 3 days ago
Main PID: 371 (sshd)
  CGroup: name=systemd:/system/sshd.service
  └ 371 /usr/sbin/sshd -D

Jul 22 18:12:18 negra sshd[11272]: SSH: Server;Ltype: Version;Remote:
192.168.0.100-60763;Protocol: 2.0;Client: OpenSSH_5.9p1-hpn13v11lpk
Jul 22 18:12:18 negra sshd[11272]: SSH: Server;Ltype: Kex;Remote:
192.168.0.100-60763;Enc: aes128-ctr;MAC: hmac-md5;Comp: none [preauth]
Jul 22 18:12:19 negra sshd[11272]: SSH: Server;Ltype: Authname;Remote:
192.168.0.100-60763;Name: canek [preauth]
Jul 22 18:12:22 negra sshd[11272]: Accepted publickey for canek from
192.168.0.100 port 60763 ssh2
Jul 22 18:12:22 negra sshd[11272]: pam_unix(sshd:session): session
opened for user canek by (uid=0)
Jul 22 21:06:54 negra sshd[11893]: SSH: Server;Ltype: Version;Remote:
192.168.0.100-35208;Protocol: 2.0;Client: OpenSSH_5.9p1-hpn13v11lpk
Jul 22 21:06:54 negra sshd[11893]: SSH: Server;Ltype: Kex;Remote:
192.168.0.100-35208;Enc: aes128-ctr;MAC: hmac-md5;Comp: none [preauth]
Jul 22 21:06:54 negra sshd[11893]: SSH: Server;Ltype: Authname;Remote:
192.168.0.100-35208;Name: canek [preauth]
Jul 22 21:06:55 negra sshd[11893]: Accepted publickey for canek from
192.168.0.100 port 35208 ssh2

As far as I know, there is nothing remotely similar in either Upstart
nor SysV init.

In my laptop and desktop, I could only use journald, but since systemd
can be used along with rsyslog/syslog-ng, I still run rsyslog:

# systemctl status rsyslog.service
rsyslog.service - System Logging Service
  Loaded: loaded (/usr/lib/systemd/system/rsyslog.service; enabled)
  Active: active (running) since Thu, 12 Jul 2012 21:39:04 -0500; 1
weeks and 3 days ago
Main PID: 388 (rsyslogd)
  CGroup: name=systemd:/system/rsyslog.service
  └ 388 /usr/sbin/rsyslogd -n -c5

The reason is only that I actually like to keep my logs, even if for a
laptop/desktop is most of the times not necessary. I think the only
thing I did to set rsyslog as my logger service was to link the
syslog.service file to it:

# ll /etc/systemd/system/syslog.service
lrwxrwxrwx 1 root root 39 Jan 18  2012
/etc/systemd/system/syslog.service ->
/usr/lib/systemd/system/rsyslog.service

For my servers journald is cute, but I would never think about
removing a "real" logger.

So, in short: for servers install a real logger (I recommend rsyslog,
although syslog-ng should also work), and for laptop/desktop you
*could* do just with journald, but if it makes you feel better (as it
does in my case) you can also install a real logger.

Now that I think about it, I haven't really looked at my logs neither
in my laptop nor desktop in months. I think I could easily remove
rsyslog and just have journald; but rsyslog is light enough, and
having the logs there gives me a little peace of mind.

Regards.
-- 
Canek Peláez Valdés
Posgrado en Ciencia e Ingeniería de la Computación
Universidad Nacional Autónoma de México

Re: [gentoo-user] linux-headers-3.5 with 3.4 kernel?

[Florian Philipp]

Am 23.07.2012 16:16, schrieb Nikos Chantziaras:
> Portage now installs sys-kernel/linux-headers-3.5.
> sys-kernel/gentoo-sources is at 3.4.5.
> 
> Is it even adviced to do that, installing 3.5 headers and running a 3.4
> kernel?  This sounds like a bad idea to me.
> 
> 

Honestly, I cannot give you a satisfying explanation, but

a) I came across this:
http://forums.gentoo.org/viewtopic-t-570319-start-0.html

b) I was told the same years ago and never had issues.

c) until you re-emerge glibc nothing changes anyway.

d) your current glibc won't use new features, anyway (I guess)

e) and even then, forward/backward compatibility in kernel headers and
glibc are very good.

Regards,
Florian Philipp



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Re: [gentoo-user] Re: How can I rewrite all empty sectors with zeros?

[Jarry]

On 23-Jul-12 16:29, Nikos Chantziaras wrote:

On 22/07/12 20:18, Jarry wrote:

Hi,
I want to backup my whole hard-drive (8 partitions) with:
# dd if=/dev/sda | gzip > /path/image.gz

In order to achieve good compression level I'd like to wipe
out all empty space with zeros. How can I do that?


That's the wrong way to do it.  You should use a tool that only copies
the data, and then also backup the partition table.

Or use partimage/clonezilla like Neil mentioned which does all that
automatically.


I know those tools. Unfortunatelly, they do not support
"smart copying" (only used sectors) if software raid is used.

So I'm back on the beginning: I can clone only the whole
drive (all sectors). No matter if I use dd, clonezila or
partimage...

Jarry
--
___
This mailbox accepts e-mails only from selected mailing-lists!
Everything else is considered to be spam and therefore deleted.

Re: [gentoo-user] Re: How can I rewrite all empty sectors with zeros?

[Simon]

On Mon, Jul 23, 2012 at 10:29 AM, Nikos Chantziaras wrote:

> On 22/07/12 20:18, Jarry wrote:
>
>> Hi,
>> I want to backup my whole hard-drive (8 partitions) with:
>> # dd if=/dev/sda | gzip > /path/image.gz
>>
>> In order to achieve good compression level I'd like to wipe
>> out all empty space with zeros. How can I do that?
>>
>
> That's the wrong way to do it.  You should use a tool that only copies the
> data, and then also backup the partition table.
>
> Or use partimage/clonezilla like Neil mentioned which does all that
> automatically.
>

For my part, I found compressing all files using squashfs to be most
useful, specially for backups as restoring single files vs all files is
just as simple.
Also, using the squashfs archive as read-only base of a unioned mount
(aufs, unionfs) is also a very useful trick.

As my systems are all setup the same, I never backup the partition table
and recreate it each time (easy, and I often change the partition layout
anyway).

Simon

Re: [gentoo-user] new machine : (2) HDD or SSD ?

[Paul Hartman]

On Sun, Jul 22, 2012 at 1:46 PM, Florian Philipp  wrote:
> Am 22.07.2012 20:35, schrieb Michael Hampicke:
>> Am 22.07.2012 19:46, schrieb Florian Philipp:
>>> Am 22.07.2012 19:30, schrieb Pandu Poluan:

 On Jul 23, 2012 12:05 AM, "Michael Hampicke" >>> > wrote:
>
>> I have just a (maybe silly) question...
>> I saw on some forums that partitionning SSDs could slow down read/write
>> access.
>> Is it true or simply intox ?
>> On my sata HD, i have boot, /, usr and home separated partitions.
>> What do you think of it ?
>
> This could happen of the partitions on the SSD are not properly aligned.
> The guides I know on this subject are german, but thats no problem, just
> do a google search for something like "linux ssd partition alignment".
> There you will find all the ansers you need.
>
> If I remember correctly parted has a built-in alignment check.
>

 Even the venerable fdisk now properly align partitions, IIRC.

 Rgds,

>>>
>>> cfdisk is one of the few that don't.
>>>
>>
>> Right, cfdisk was the one, but I always likes it's console 'gui' as it
>> was so easy to use. But cgdisk (of sys-apps/gptfdisk) is a good
>> replacement for cfdisk.
>>
>
> Good to know. cfdisk was my favorite, too.

You can still use it, you just have to specify the start sector
yourself and don't accept the default. :)

4MB is almost always a safe starting point to use for SSD or other
flash-based storage. (Most fdisk tools default now to 1MB which should
be safe for all HDDs but not necessarily the best choice for flash
storage because of erase blocks etc.) Unfortunately the exact perfect
alignment depends on the specific device you're using so there is no
catch-all solution. There are tools like flashbench will will try to
reveal the optimal settings via destructive tests.

[gentoo-user] Re: How can I rewrite all empty sectors with zeros?

[Nikos Chantziaras]

On 22/07/12 20:18, Jarry wrote:

Hi,
I want to backup my whole hard-drive (8 partitions) with:
# dd if=/dev/sda | gzip > /path/image.gz

In order to achieve good compression level I'd like to wipe
out all empty space with zeros. How can I do that?


That's the wrong way to do it.  You should use a tool that only copies 
the data, and then also backup the partition table.


Or use partimage/clonezilla like Neil mentioned which does all that 
automatically.

[gentoo-user] linux-headers-3.5 with 3.4 kernel?

[Nikos Chantziaras]

Portage now installs sys-kernel/linux-headers-3.5. 
sys-kernel/gentoo-sources is at 3.4.5.


Is it even adviced to do that, installing 3.5 headers and running a 3.4 
kernel?  This sounds like a bad idea to me.

Re: [gentoo-user] mounting samsung galaxy S III (android ics)

[J. Roeleveld]

On Mon, July 23, 2012 2:12 pm, Pandu Poluan wrote:
> On Jul 23, 2012 4:36 PM, "Neil Bothwick"  wrote:
>>
>> On Sun, 22 Jul 2012 19:53:20 -0400, Mike Gilbert wrote:
>>
>> > I have found go-mtpfs to work much better with my Galaxy Nexus.
>> >
>> > https://github.com/hanwen/go-mtpfs/
>> >
>> > There is no ebuild for it, mostly because I haven't figured out how to
>> > package go programs.
>>
>> There is also Kies, a Samsung program in the market that does the same
>> sort of thing as AirDroid. I tried AirDroid a couple of phones ago but
>> can't remember why I didn't like it.
>>
>
> Me, it's the other way around. Can't stand Kies Air, so I changed to
> AirDroid.

Same here, Kies Air doesn't allow multiple files to be selected downloaded
at once, something I find an absolute must when wanting to download the
pictures I took of my daughter playing :)

-- 
Joost

Re: [gentoo-user] mounting samsung galaxy S III (android ics)

[Pandu Poluan]

On Jul 23, 2012 4:36 PM, "Neil Bothwick"  wrote:
>
> On Sun, 22 Jul 2012 19:53:20 -0400, Mike Gilbert wrote:
>
> > I have found go-mtpfs to work much better with my Galaxy Nexus.
> >
> > https://github.com/hanwen/go-mtpfs/
> >
> > There is no ebuild for it, mostly because I haven't figured out how to
> > package go programs.
>
> There is also Kies, a Samsung program in the market that does the same
> sort of thing as AirDroid. I tried AirDroid a couple of phones ago but
> can't remember why I didn't like it.
>

Me, it's the other way around. Can't stand Kies Air, so I changed to
AirDroid.

Rgds,

Re: [gentoo-user] 'profile' USE-flag - what for?

[Alan McKinnon]

On Mon, 23 Jul 2012 12:52:43 +0300
v...@ukr.net wrote:

>   Hello!
>   Could somebody please explain me the role of "profile' USE-flag for
> a regular user's PC? 
> 
> "profile   : Adds support for software performance analysis (will
> likely vary from ebuild to ebuild)"

It's a generic catch-all USE flag and it has nothing to do with gentoo
profiles at all.

Because it's so generic, each ebuild will use it differently. Each
package will have it's own idea on how to enable profiling, and each
package will be different. You have to know how eacjh package does
profiling for this flag to be any use at all

> * Is if of any use in such case at all? 

Are you running the software through a performance profiler?

If not, then you don't need the flag enabled.

> * If it is, what does it provide for a regular user?

Run "equery hasuse profile" on your host and read each ebuild listed.

For regular users, the flag ius highly unlikely to be of any use at all

> * Is it safe to turn it off?

Yes



-- 
Alan McKinnon
alan.mckin...@gmail.com

[gentoo-user] 'profile' USE-flag - what for?

[v_2e]

  Hello!
  Could somebody please explain me the role of "profile' USE-flag for a
regular user's PC? 

"profile   : Adds support for software performance analysis (will likely
vary from ebuild to ebuild)"

* Is if of any use in such case at all? 
* If it is, what does it provide for a regular user?
* Is it safe to turn it off?

  Thanks!
Vladimir

- 
 

Re: [gentoo-user] mounting samsung galaxy S III (android ics)

[Neil Bothwick]

On Sun, 22 Jul 2012 19:53:20 -0400, Mike Gilbert wrote:

> I have found go-mtpfs to work much better with my Galaxy Nexus.
> 
> https://github.com/hanwen/go-mtpfs/
> 
> There is no ebuild for it, mostly because I haven't figured out how to
> package go programs.

There is also Kies, a Samsung program in the market that does the same
sort of thing as AirDroid. I tried AirDroid a couple of phones ago but
can't remember why I didn't like it.



-- 
Neil Bothwick

This is as bad as it can get-but don't bet on it.


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Re: [gentoo-user] systemd and gnome3

[Stefan G. Weichinger]

(replying to list as I assume this could interest and/or help other
users as well)

Peter, Canek, how did you approach syslogs?

systemd brings its own journal (readable via systemd-journalctl, learned
right now) and so it possible to run the box without syslog-ng or similar.

archlinux-wiki tells me how to combine things:

https://wiki.archlinux.org/index.php/Systemd#Systemd_Journal

but I wonder what your solutions/opinions are so far ...

Thanks, Stefan

Re: [gentoo-user] How can I rewrite all empty sectors with zeros?

[Neil Bothwick]

On Sun, 22 Jul 2012 19:18:44 +0200, Jarry wrote:

> I want to backup my whole hard-drive (8 partitions) with:
> # dd if=/dev/sda | gzip > /path/image.gz
> 
> In order to achieve good compression level I'd like to wipe
> out all empty space with zeros. How can I do that?

It may be worth your while looking at partimage (which can also image
whole drives). It only copies used sectors so avoids the problem of
storing obsolete data. I believe Clonezilla uses partimage, and you'd
have to use a live CD to image a system drive like this anyway.


-- 
Neil Bothwick

War does not determine who is right -- only who is left.


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