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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
