Re: [Emc-users] rtai on 12.04 Ubuntu

[dave]

Ah! Might change and probably will. Murphy and all his cousins are alive 
and well.
Thanks for the comment.

However, I update very sparselystill running on a 1200 Duron and 
2.5? Clearly time to upgrade. ;-)
My goal is to consistently make chips.

Dave

On 01/05/2017 05:15 PM, Kurt Jacobson wrote:
> I found out the hard way that it is not a good idea to select the kernel
> numerically (e.g. GRUB_DEFAULT="2>3") since if another kernel is added (by
> an update?) the order might change.
>
> I now use the string method as below exclusively and have not had any
> surprises since.
> GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.4-9-rtai-686-pae"
>
> Kurt
>
> On Thu, Jan 5, 2017 at 3:32 PM, dave  wrote:
>
>> With  some help from Kent this turns out to be not too onerous.
>>
>> Boot your system and on the boot menu note which kernel you want ( by
>> number ) starting with 0.
>> Ditto if you are in the alternate menu.
>>
>> #modify /etc/default/grub
>>
>> $cd /etc/default
>> sudo vim grub
>> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
>> to GRUB_DEFAULT="2>n"
>> save and exit vim
>>
>> # or in main menu just GRUB_DEFAULT="count-1"
>> # in alternate menu = "line number of alternate menu in main
>> menu>count-1 in menu"
>>
>> #update grub.cfg
>> sudo update-grub
>>
>> #reboot
>> sudo shutdown -r now
>>
>> # or you can select the kernel like this by string.
>> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
>> #where n is the entry you want (count -1).
>>
>> #For the original menu I think you can omit the n> and go with it.
>> #remember anytime you change /etc/default/grub you need  to update grub.
>> Don't ask me
>> #how I know.
>>
>> Now it is up to someone good with good documentation skills to make
>> certain this is understandable and get it into the docs.
>>
>> HTH
>>
>>
>>
>>
>> On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
>>> On 01/03/2017 04:47 PM, dave wrote:
 Re:
 http://linuxcnc.org/docs/html/getting-started/getting-
>> linuxcnc.html#_installing_on_ubuntu_precise
 The instructions for the install are nicely done. I tried it both by
 typing individual lines and  by enclosing the block of instructions in
>> {}.
 Seemed to work either way but no joy on uname -r |  uname -a.

 Apparently grub does not get updated by the install and therefore one
 boots into the ...generic.
 I've pretty well worked my way thru  grub but need to weed the list to a
 generic, generic(recovery) and
 rtai.  Rtai comes up on a secondary list and I need to change that.

 Not complaining just a heads up. Nice to have it all laid out.
>>> If you figure out a clear way to describe the changes needed to the GRUB
>>> config, an update to the docs would be much appreciated!
>>>
>>>
>>
>> 
>> --
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
>> ___
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>> Emc-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/emc-users
>>
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Re: [Emc-users] rtai on 12.04 Ubuntu

[Kurt Jacobson]

I found out the hard way that it is not a good idea to select the kernel
numerically (e.g. GRUB_DEFAULT="2>3") since if another kernel is added (by
an update?) the order might change.

I now use the string method as below exclusively and have not had any
surprises since.
GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.4-9-rtai-686-pae"

Kurt

On Thu, Jan 5, 2017 at 3:32 PM, dave  wrote:

> With  some help from Kent this turns out to be not too onerous.
>
> Boot your system and on the boot menu note which kernel you want ( by
> number ) starting with 0.
> Ditto if you are in the alternate menu.
>
> #modify /etc/default/grub
>
> $cd /etc/default
> sudo vim grub
> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
> to GRUB_DEFAULT="2>n"
> save and exit vim
>
> # or in main menu just GRUB_DEFAULT="count-1"
> # in alternate menu = "line number of alternate menu in main
> menu>count-1 in menu"
>
> #update grub.cfg
> sudo update-grub
>
> #reboot
> sudo shutdown -r now
>
> # or you can select the kernel like this by string.
> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
> #where n is the entry you want (count -1).
>
> #For the original menu I think you can omit the n> and go with it.
> #remember anytime you change /etc/default/grub you need  to update grub.
> Don't ask me
> #how I know.
>
> Now it is up to someone good with good documentation skills to make
> certain this is understandable and get it into the docs.
>
> HTH
>
>
>
>
> On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
> > On 01/03/2017 04:47 PM, dave wrote:
> >> Re:
> >> http://linuxcnc.org/docs/html/getting-started/getting-
> linuxcnc.html#_installing_on_ubuntu_precise
> >>
> >> The instructions for the install are nicely done. I tried it both by
> >> typing individual lines and  by enclosing the block of instructions in
> {}.
> >> Seemed to work either way but no joy on uname -r |  uname -a.
> >>
> >> Apparently grub does not get updated by the install and therefore one
> >> boots into the ...generic.
> >> I've pretty well worked my way thru  grub but need to weed the list to a
> >> generic, generic(recovery) and
> >> rtai.  Rtai comes up on a secondary list and I need to change that.
> >>
> >> Not complaining just a heads up. Nice to have it all laid out.
> > If you figure out a clear way to describe the changes needed to the GRUB
> > config, an update to the docs would be much appreciated!
> >
> >
>
>
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> ___
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>
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Re: [Emc-users] rtai on 12.04 Ubuntu

[Andrew]

2017-01-05 22:32 GMT+02:00 dave :

> With  some help from Kent this turns out to be not too onerous.
>
> Boot your system and on the boot menu note which kernel you want ( by
> number ) starting with 0.
> Ditto if you are in the alternate menu.
>
> #modify /etc/default/grub
>
> $cd /etc/default
> sudo vim grub
> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
> to GRUB_DEFAULT="2>n"
> save and exit vim
>
> # or in main menu just GRUB_DEFAULT="count-1"
> # in alternate menu = "line number of alternate menu in main
> menu>count-1 in menu"
>
> #update grub.cfg
> sudo update-grub
>
> #reboot
> sudo shutdown -r now
>
> # or you can select the kernel like this by string.
> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
> #where n is the entry you want (count -1).
>
> #For the original menu I think you can omit the n> and go with it.
> #remember anytime you change /etc/default/grub you need  to update grub.
> Don't ask me
> #how I know.
>
> Now it is up to someone good with good documentation skills to make
> certain this is understandable and get it into the docs.
>
> I successfully used grub-customizer to change boot options (isolcpus
etc.) an set defaults.

Andrew
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Re: [Emc-users] rtai on 12.04 Ubuntu

[Kurt Jacobson]

I found out the hard way that it is not a good idea to select the kernel
numerically (e.g. GRUB_DEFAULT="2>3") since if another kernel is added (by
an update?) the order might change.

I now use the string method as below exclusively and have not had any
surprises since.
GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.4-9-rtai-686-pae"

Kurt

On Thu, Jan 5, 2017 at 3:32 PM, dave  wrote:

> With  some help from Kent this turns out to be not too onerous.
>
> Boot your system and on the boot menu note which kernel you want ( by
> number ) starting with 0.
> Ditto if you are in the alternate menu.
>
> #modify /etc/default/grub
>
> $cd /etc/default
> sudo vim grub
> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
> to GRUB_DEFAULT="2>n"
> save and exit vim
>
> # or in main menu just GRUB_DEFAULT="count-1"
> # in alternate menu = "line number of alternate menu in main
> menu>count-1 in menu"
>
> #update grub.cfg
> sudo update-grub
>
> #reboot
> sudo shutdown -r now
>
> # or you can select the kernel like this by string.
> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
> #where n is the entry you want (count -1).
>
> #For the original menu I think you can omit the n> and go with it.
> #remember anytime you change /etc/default/grub you need  to update grub.
> Don't ask me
> #how I know.
>
> Now it is up to someone good with good documentation skills to make
> certain this is understandable and get it into the docs.
>
> HTH
>
>
>
>
> On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
> > On 01/03/2017 04:47 PM, dave wrote:
> >> Re:
> >> http://linuxcnc.org/docs/html/getting-started/getting-
> linuxcnc.html#_installing_on_ubuntu_precise
> >>
> >> The instructions for the install are nicely done. I tried it both by
> >> typing individual lines and  by enclosing the block of instructions in
> {}.
> >> Seemed to work either way but no joy on uname -r |  uname -a.
> >>
> >> Apparently grub does not get updated by the install and therefore one
> >> boots into the ...generic.
> >> I've pretty well worked my way thru  grub but need to weed the list to a
> >> generic, generic(recovery) and
> >> rtai.  Rtai comes up on a secondary list and I need to change that.
> >>
> >> Not complaining just a heads up. Nice to have it all laid out.
> > If you figure out a clear way to describe the changes needed to the GRUB
> > config, an update to the docs would be much appreciated!
> >
> >
>
>
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
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> https://lists.sourceforge.net/lists/listinfo/emc-users
>



-- 
*Kurt Jacobson*
MET Student - Southern Polytechnic College of Engineering
Vice President - Kennesaw Nuclear Society
Student Assistant - Center for Nuclear Studies
Kennesaw State University | Marietta Campus
Cell: 505-303-1933 - *NOTE:* Changed as of 12/1/16
E-mail: kurtjacob...@bellsouth.net
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Re: [Emc-users] rtai on 12.04 Ubuntu

[dave]

With  some help from Kent this turns out to be not too onerous.

Boot your system and on the boot menu note which kernel you want ( by 
number ) starting with 0.
Ditto if you are in the alternate menu.

#modify /etc/default/grub

$cd /etc/default
sudo vim grub
change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu 
to GRUB_DEFAULT="2>n"
save and exit vim

# or in main menu just GRUB_DEFAULT="count-1"
# in alternate menu = "line number of alternate menu in main 
menu>count-1 in menu"

#update grub.cfg
sudo update-grub

#reboot
sudo shutdown -r now

# or you can select the kernel like this by string.
#GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
#where n is the entry you want (count -1).

#For the original menu I think you can omit the n> and go with it.
#remember anytime you change /etc/default/grub you need  to update grub. 
Don't ask me
#how I know.

Now it is up to someone good with good documentation skills to make 
certain this is understandable and get it into the docs.

HTH




On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
> On 01/03/2017 04:47 PM, dave wrote:
>> Re:
>> http://linuxcnc.org/docs/html/getting-started/getting-linuxcnc.html#_installing_on_ubuntu_precise
>>
>> The instructions for the install are nicely done. I tried it both by
>> typing individual lines and  by enclosing the block of instructions in {}.
>> Seemed to work either way but no joy on uname -r |  uname -a.
>>
>> Apparently grub does not get updated by the install and therefore one
>> boots into the ...generic.
>> I've pretty well worked my way thru  grub but need to weed the list to a
>> generic, generic(recovery) and
>> rtai.  Rtai comes up on a secondary list and I need to change that.
>>
>> Not complaining just a heads up. Nice to have it all laid out.
> If you figure out a clear way to describe the changes needed to the GRUB
> config, an update to the docs would be much appreciated!
>
>


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Re: [Emc-users] rtai on 12.04 Ubuntu

[Sebastian Kuzminsky]

On 01/03/2017 04:47 PM, dave wrote:
> Re:
> http://linuxcnc.org/docs/html/getting-started/getting-linuxcnc.html#_installing_on_ubuntu_precise
>
> The instructions for the install are nicely done. I tried it both by
> typing individual lines and  by enclosing the block of instructions in {}.
> Seemed to work either way but no joy on uname -r |  uname -a.
>
> Apparently grub does not get updated by the install and therefore one
> boots into the ...generic.
> I've pretty well worked my way thru  grub but need to weed the list to a
> generic, generic(recovery) and
> rtai.  Rtai comes up on a secondary list and I need to change that.
>
> Not complaining just a heads up. Nice to have it all laid out.

If you figure out a clear way to describe the changes needed to the GRUB 
config, an update to the docs would be much appreciated!


-- 
Sebastian Kuzminsky

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Re: [Emc-users] rtai on 12.04 Ubuntu

[dave]

Re:
http://linuxcnc.org/docs/html/getting-started/getting-linuxcnc.html#_installing_on_ubuntu_precise

The instructions for the install are nicely done. I tried it both by 
typing individual lines and  by enclosing the block of instructions in {}.
Seemed to work either way but no joy on uname -r |  uname -a.

Apparently grub does not get updated by the install and therefore one 
boots into the ...generic.
I've pretty well worked my way thru  grub but need to weed the list to a 
generic, generic(recovery) and
rtai.  Rtai comes up on a secondary list and I need to change that.

Not complaining just a heads up. Nice to have it all laid out.

Dave





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