Date: Mon, 14 Aug 2006 18:34:59 +0200 From: Daniel Gerzo <danger@rulez.sk> To: gahn <ipfreak@yahoo.com> Cc: freebsd general questions <freebsd-questions@freebsd.org> Subject: Re[2]: quick way fall back to the original kernel Message-ID: <1391596840.20060814183459@rulez.sk> In-Reply-To: <20060814160708.55919.qmail@web52114.mail.yahoo.com> References: <20060814133306.GA8795@gothmog.pc> <20060814160708.55919.qmail@web52114.mail.yahoo.com>
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Hello gahn, Monday, August 14, 2006, 6:07:08 PM, you wrote: > Thanks for ur advice. > actually i did that; rename the current kernel and > name the "kernel.old to "kernel", which worked. but i > am looking for a command that could do that. you actually don't have to rename your kernels when you want to boot different one to /boot/kernel. All you need is to set some variables in /boot/loader.conf. See the approporiate manual page loader.conf(5) and /boot/defaults/loader.conf. As a hint check the kernel and bootfile variables. Or there is also utility called nextboot(8). > the reason is that i am trying to keep my kernel up to > date, but my understanding is that it could be done > only with the original kernel, right? or i am > mistaken... > as to kernel.safe, there is no this directory by > default (even boot manual has option for kernel safe). > i am wondering where the kernel.safe is... kernel.safe does not exist by default. Giorgos's kernel.safe directory is only a copy of kernel which simply "works" for him and he is certainly sure it does. Of course, you can keep as much kernels as you want in your /boot directory (well, depends on how much of the free space you have on root partition :-)) and you can name them let's say kernel-06-03-20 and so on. Please, also the corresponding chapter in our great Handbook: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html and also this document can be good source for you: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/boot-blocks.html > but i do keep a copy of the orginal kernel in case i > loss track of kernel version... Once you run make installkernel, the previous version of your kernel is copied into the kernel.old directory. > --- Giorgos Keramidas <keramida@ceid.upatras.gr> > wrote: >> On 2006-08-14 11:20, dick hoogendijk >> <dick@nagual.nl> wrote: >> > On 13 Aug Atom Powers wrote: >> > > And, although I've never tried it, you sholud be >> able to `cp >> > > /boot/kernel.old /boot/kernel` to restore the >> previous kernel.> >> > >> > I did. A few times. I just renamed the directories >> to "kernel" and >> > "whatevername" ;-) Works like a charm.. >> >> Right. >> >> I usually wait a few days to make sure there are no >> funny problems with >> the CURRENT kernel I'm using, and then run: >> >> # cd /boot >> # rm -fr kernel.safe >> # cp -Rp kernel kernel.safe >> >> This way, I have /boot/kernel, /boot/kernel.old and >> /boot/kernel.safe. >> >> By keeping kernel.safe out of the (kernel, >> kernel.old) way, I'm sure >> that I won't accidentally lose my 'safe' kernels >> because I run "make >> installkernel" at the wrong time. >> >> HTH, >> Giorgos -- Best regards, Daniel mailto:danger@rulez.sk
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