Need help to understand /boot entries with 2 Kernels
I started today to compile a 2.6.x Kernel.
After reading many guides (they called themself so far) I started with the compile procedure,...anyway.
I copied the vmlinuz*,System.map*, and config* file into the /boot directory.
Now...the old symbolic links are linked to the 2.4 kernel files. Ok, but I need different ones for the lilo entries to choose between the 2 kernel versions.
Would it work if I create 3 new symbolic links called vmlinuz-2.6, System.map-2.6 and config-2.6 and set the image entry into the lilo.conf file?
Further, why are these files linked at all and not used directly?
There should be no need to link them. But it's very convenient that the "make install" with recent 2.6.x kernels copy the files to /boot automatically (this is what I know and what my installation does, don't know why you had to copy them manually). This way once you have a Lilo entry pointing to vmlinuz you should always be ok if the last messages from "make install" show a succesful Lilo run.
You can of course rename the files to get more descriptive names and create a link to,let's say, vmlinuz-2.6.16-oklaus, with the name vmlinuz. If you look in /boot the former vmlinuz is just a symlink to vmlinuz-ide-xxxxx or another kernel. You could change the entry for your old 2.4.x-kernel to that longer name and add a new vmlinuz for the (automatically??) copied 2.6.x one.
I haven't done this in a while, but I think it will work. As long as the 2.4 configs aren't touched you don't need to worry about making your system unbootable. And even then if you have a copy of the Slackware install CD, you can boot with it (there are instructions before you boot a kernel from the CD).
The symbolic links are there to allow quicker recovery if you mess up something. If you miscompile, you kill the vmlinuz file and create a symlink to the old kernel. Et voila, things will work until you have a chance to fix the kernel :)
Try to keep it simple and some of the guides you read may be old or not for slackware.
Here is the slackware way;
I have also used a kernel from kernel.org and did it like this.
make && make modules_install && make install
this creates the symlink from
/usr/src/linux/arch/i386/boot/bzImage (this you created with make and make modules_install
and names it vmlinuz
or you can copy it yourself without the make install like;
cp arch/i386/boot/bzImage /boot/kernel-2.6.12-gentoo-r10(this you can name yourself)
I hope I didn't confuse you more ...
Here is my :twocents::
I dislike using soft links to my kernels. Whenever I update a distro, or a kernel package from a distro vendor, the distro vendor always installs and then overwrites that soft link. PV does this too. :( If I am not paying attention, my boot loader menu no longer matches. So instead of using the soft links in my boot loader, I always hard-code the boot loader menu option directly to the actual kernel rather than the soft link. I then ignore the soft link. I then add a new boot loader menu option for the new kernel. Then, if things are mucked up, I can revert to my previous kernel and menu options. After a while and I become satisfied that my new kernel is working according to Hoyle, I then edit my boot loader menu to remove the previous kernel option.
With this strategy I never worry about distro vendors confusing me. Getting out of bed each day is tough enough of a challenge! :D
Thank's a lot guy's.
All post are really helpful.
I will install the new kernel from scratch again and use your tip's.
Really, make install(.sh) copies the image and map file to /boot, after it set new links to the old kernel files and set no new symlinks. It copies the image and map file to /boot and name it vmlinuz & System.map.
But it will not add new lilo.conf entries. I had to insert the option for the old kernel (files named *.old from install.sh) manually.
Anyway, I get a kernel panic. :D
All posts I read so far including my Panic message are related to filesystems which are not build-in the kernel or SCSI/RAID solutions. But I only use ext2 on my IDE HD. It's built-in definitely and I guess initrd is needlessly. But that's another issue and if I don't figure it out I will start a new Thread.
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