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howtos:slackware_admin:booting_install_from_hdd [2012/10/24 12:47 (UTC)]
bormant created
howtos:slackware_admin:booting_install_from_hdd [2013/05/23 12:33 (UTC)] (current)
whiz [GRUB-legacy]
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 This article shows how to boot the Slackware installation environment from a hard drive instead of the usual installation media. This article shows how to boot the Slackware installation environment from a hard drive instead of the usual installation media.
  
-The Slackware installation environment is a small live Linux system with busybox, partitioning and another ​useful utilities, and the ''​setup''​ program. It starts automatically when you boot your system from Slackware install media: CD, DVD, USB stick or PXE.+The Slackware installation environment is a small live Linux system with busybox, partitioning and some other useful utilities, and the ''​setup''​ program. It starts automatically when you boot your system from Slackware install media: CD, DVD, USB stick or PXE.
  
 In order to boot the Slackware installation environment without creating install media you need an image of this boot environment,​ a suitable Linux kernel, and a boot loader. In order to boot the Slackware installation environment without creating install media you need an image of this boot environment,​ a suitable Linux kernel, and a boot loader.
  
 +With grub2 you can also boot from the iso file by adding it to the grub menu.
 ===== Image of the Environment ===== ===== Image of the Environment =====
-All software you can use after booting Slackware installation media resides in an [[wp>​initrd|initial ramdisk image]]. You can find it as ''/​isolinux/​initrd.img''​ on any installation media or at the same location on any of the Slackware mirrors. ​+All software ​that you can use after booting ​the Slackware installation media resides in an [[wp>​initrd|initial ramdisk image]]. You can find it as ''/​isolinux/​initrd.img''​ on any installation media or at the same location on any of the Slackware mirrors. ​
  
 ===== Linux Kernel ===== ===== Linux Kernel =====
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 ===== Boot Loader ===== ===== Boot Loader =====
-There are many boot loaders around. Slackware uses SYSLINUX to boot from the install media, installs LILO to boot the installed system, and provides a GRUB-legacy package in ''/​extra''​ (32 bit only). Many distributions use GRUB (renamed from GRUB2) as their main boot loader. If you use a Linux system you probably already have a suitable one. You need to put the ''​bzImage''​ and ''​initrd.img''​ files in a suitable place and instruct the boot loader to boot them. \\ Note that some parameters are passed to the kernel in ''/​isolinux/​isolinux.cfg''​you need them to properly ​configure your boot loader. +There are many boot loaders around. Slackware uses SYSLINUX to boot from the install media, installs LILO to boot the installed system, and provides a GRUB-legacy package in ''/​extra''​ (32 bit only). Many distributions use GRUB (renamed from GRUB2) as their main boot loader. If you use a Linux system you probably already have a suitable one. You need to put the ''​bzImage''​ and ''​initrd.img''​ files in a suitable place and instruct the boot loader to boot them. \\ Note that some parameters are passed to the kernel in ''/​isolinux/​isolinux.cfg''​you need them to configure your boot loader ​properly.
 ==== LILO ==== ==== LILO ====
 Add to ''/​etc/​lilo.conf''​ something like: <​file>​ Add to ''/​etc/​lilo.conf''​ something like: <​file>​
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   initrd /​boot/​swsetup/​initrd.img   initrd /​boot/​swsetup/​initrd.img
 </​file>​ </​file>​
-<​note>​(hd0,​1) means the //second partition// (this is not a typo, first partition has number ​here) on the //first drive// (i.e. ''/​dev/​sda2''​). You can find the right value in the "''​root''"​ command in the section used to boot your system; or else consult with [[http://​www.gnu.org/​software/​grub/​manual/​legacy/​grub.html|GRUB-legacy manual]]. </​note>​+<​note>​(hd0,​1) means the //second partition// (this is not a typo, GRUB-legacy numbers partitions from 0) on the //first drive// (i.e. ''/​dev/​sda2''​). You can find the right value in the "''​root''"​ command in the section used to boot your system; or else consult with [[http://​www.gnu.org/​software/​grub/​manual/​legacy/​grub.html|GRUB-legacy manual]]. </​note>​
 <​note>​If you use a separate partition for ''/​boot'',​ then you must remove "/​boot"​ from any pathnames.</​note>​ <​note>​If you use a separate partition for ''/​boot'',​ then you must remove "/​boot"​ from any pathnames.</​note>​
  
 +
 +==== Boot ISO with GRUB2 ====
 +Add to ''/​etc/​grub.d/​40_custom'':​ <​file>​
 +menuentry "​Slackware 14 install (DVD)" {
 + ​insmod loopback
 + ​insmod iso9660
 + set isofile="/​slackware64-14.0-install-dvd.iso"​
 + ​loopback loop (hd0,​2)$isofile
 + linux (loop)/​kernels/​huge.s/​bzImage ​ load_ramdisk=1 prompt_ramdisk=0 rw printk.time=0 SLACK_KERNEL=huge.s
 + ​initrd (loop)/​isolinux/​initrd.img
 +}
 +</​file>​
 +<​note>​(hd0,​2) means "//the second partition on the first drive//"​ (i.e. ''/​dev/​sda2''​). You can find the right value in the "''​set root''"​ command of the menu entry used to boot your system, or else consult with [[http://​www.gnu.org/​software/​grub/​manual/​grub.html|GRUB manual]]. </​note>​
 +Then update grub with: <​file>​
 + ​grub-mkconfig -o /​boot/​grub/​grub.cfg
 +</​file>​
 +<​note>​On Slackware before running grub-mkconfig you have to run ln -s /dev/sda2 /dev/root
 +where for sda2 you have to enter your root device.
 +</​note>​
 ===== Test It ===== ===== Test It =====
 Reboot your system and select SwSetup at boot prompt. Reboot your system and select SwSetup at boot prompt.
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 Then continue as usual. Then continue as usual.
  
-Slackware setup automatically finds an ISO image if it is named as ''​slackwar*-install-dvd.iso''​. ​\\  +Slackware setup (starting with version 13.0) automatically finds an ISO image if it is named as ''​slackwar*-install-dvd.iso''​. 
 +  
 You can also mount your image manually. You can also mount your image manually.
   * Before starting ''​setup''​ or later from another console (use <​key>​Alt</​key>​+<​key>​F#</​key>​ to switch to a different console number "#"​),​ execute <​code>​   * Before starting ''​setup''​ or later from another console (use <​key>​Alt</​key>​+<​key>​F#</​key>​ to switch to a different console number "#"​),​ execute <​code>​

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