configure and modify the kernel setting, GENTOO installed

[Allal Mohamed]

i want that you awnser for this thanks pls, i have installed the system and i m in Kde desktop, and i want to set up the power manager, for this i have to set up somme new configuration in the kernel, i use as in the instalation of the system -gentoo- make menuconfig. but i have not compiled it yet, i want to now if the way is the same as in the installation ( what mean by the command# make && make modules_install and next by coping the kernel image in the boot part) or here the way is diffrent, also if i do what this can affect in installed programme in part and the system at all in other part (note im in kde and i won^t to repeat his instalation ). THANKS VERY MUCH

[nemectic]

It'd the same as during installation yes.

Ideally though you want to copy it to a different file in /boot, so if your first kernel is "/boot/kernel" you'd copy the new one to "/boot/kernel-1". You can make the name more meaningful or relevant to you of course. Then you'll need to create a second grub entry, assuming you're using grub (not grub2), just edit your grub.cfg and copy/paste the lines for your first kernel, changing the line that points to the kernel to point to the new name (ie. /boot/kernel-1), and change the title so you know which to boot.

The main reason you do this is in case you break something, you always have a working kernel you can boot up if the new one doesn't work.

[Allal Mohamed]

thanks very much for the quick answer i use grub2 and i dont know how configure it, can you explain pls thanks

[nemectic]

The below commands are pretty much everything you need to do - Be sure to replace <boot partition> with the correct device, ie /dev/sda1. If you don't remember it should be listed in /etc/fstab. Also replace <version> with whatever you wish to name it. After this simply reboot and you should have a choice of kernels to boot!

[Allal Mohamed]

yes this finish the case, but i have a last question, one^s i boot in the new system (kernel changed system changed), do all the old confuguration i meam my sections , and my kde , and all my installed softs be here present in this new system, it will be bad to remake all thanks very very much

[nemectic]

Yes they'll all still be there. It's just one small (very important) part you've changed!