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howtos:general_admin:setting_up_a_slackware_chroot [2015/11/09 12:56 (UTC)]
dugan 		howtos:general_admin:setting_up_a_slackware_chroot [2020/11/16 12:54 (UTC)] (current)
aaditya [See also] fix formatting
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-==== Setting up a Slackware chroot ====+===== Setting up a Slackware chroot =====
  
 There are multiple reasons why you might want to set up a Slackware chroot: There are multiple reasons why you might want to set up a Slackware chroot:
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 For this guide, we'll create a chroot at **/chroot_folder** from **slackware-14.1-install-dvd.iso**. For this guide, we'll create a chroot at **/chroot_folder** from **slackware-14.1-install-dvd.iso**.
  
-=== Obtaining a Slackware installation of your desired architecture ===+==== Obtaining a Slackware installation of your desired architecture ====
  
 Start with a Slackware installation DVD. Download it from from http://www.slackware.com/getslack/ via torrent. Start with a Slackware installation DVD. Download it from from http://www.slackware.com/getslack/ via torrent.
  
-=== Installing the packages ===+==== Installing the packages ====
  
-== Automatically ==+=== Automatically ===
  
-You can create your chroot and install Slackware into it using the following elegant script: [[http://dawoodfall.net/files/scripts/bash/mkchroot]]+You can create your chroot and install Slackware into it using the following elegant script: [[http://tty1.uk/scripts/slackware/mkchroot]]
  
-== Manually ==+=== Manually ===
  
 First, create a folder which will contain the chroot: First, create a folder which will contain the chroot:
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 </code> </code>
  
-=== Mounting the Chroot ===+=== Setting up required files ===
  
-To have the chroot mounted permanently, add the following to your fstab:+== fstab == 
 + 
 +The following minimal snippet can be used for ///chroot_folder/etc/fstab// 
 + 
 +<file> 
 +# <file system> <mount point>   <type>  <options>       <dump>  <pass> 
 +tmpfs           /dev/shm        tmpfs    defaults        0      0 
 +devpts          /dev/pts        devpts   noexec,nosuid,gid=tty,mode=0620  0      0 
 +sysfs           /sys            sysfs    defaults        0      0 
 +proc            /proc           proc     defaults        0      0 
 +</file> 
 + 
 +==== Entering the Chroot ==== 
 + 
 +=== Automatic mount === 
 + 
 +To have the chroot mounted permanently, add the following to your __host system's__ ///etc/fstab//:
  
 <file> <file>
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 </file> </file>
  
-If you don't want to reboot at this point, then you can mount the chroot manually:+And reboot. Then run the following command to mount the chroot folder:
  
 <code bash> <code bash>
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 </code> </code>
  
-Also, refer to: ([[howtos:slackware_admin:how_to_chroot_from_media#volume_mounting]]).+=== Manual mount ===
  
-=== Chrooting into the Chroot ===+Refer to: ([[howtos:slackware_admin:how_to_chroot_from_media#volume_mounting]]).
  
-Now that the chroot is set up, you can chroot into it:+=== Entering the Chroot === 
 + 
 +Now that the chroot is set up, one can chroot into it:
  
 <code bash>chroot /chroot_folder /bin/bash</code> <code bash>chroot /chroot_folder /bin/bash</code>
 +
 +**Note**
 +
 +Wrote a small script to automate the chroot steps.
 +
 +https://raw.githubusercontent.com/aadityabagga/scripts/master/chroot.sh
  
 === Updating packages === === Updating packages ===
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 When you're done, exited the chroot by pressing //Ctrl+d//. When you're done, exited the chroot by pressing //Ctrl+d//.
  
-=== One Use: Building 32-bit Packages ===+==== Usecase: Building 32-bit Packages ====
  
-== Mounting partitions ==+=== Mounting partitions ===
  
 I use a chroot to build 32-bit packages on a 64-bit system. I needed to mount the partition which contained the SlackBuilds for which I wanted to make a package, As my Slackware host mount point is (in this example) at /slackware_host_mount_point, I used the command: I use a chroot to build 32-bit packages on a 64-bit system. I needed to mount the partition which contained the SlackBuilds for which I wanted to make a package, As my Slackware host mount point is (in this example) at /slackware_host_mount_point, I used the command:
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 ARCH=i686 ./my_package.SlackBuild</code> ARCH=i686 ./my_package.SlackBuild</code>
  
-=== Links ===+=== An alternative way to build other ARCH packages ===
  
-http://www.linuxquestions.org/questions/slackware-installation-40/install-slackware-to-a-folder-using-chroot-825598/#post4093831+Instead of using `ARCH=i686' before running a slackbuild, we can use a program 
 +called `setarch', which, among other things, can set the ARCH and the kernel 
 +version in the shell.  It has some handy symlinks, such as linux32 or i586, 
 +which saves some typing.  The `linux32' command will set the reported kernel's 
 +ARCH as `i686'.
  
-== Notes ==+**SYNOPSIS** 
 +<code> 
 +  setarch arch [options] [program [argument...]] 
 +</code>
  
-Wrote a small script to automate these steps.+When we run `linux32' it starts a new shell, so we can also use it to chroot:
  
-https://raw.githubusercontent.com/aadityabagga/scripts/master/chroot.sh+<code> 
 +  chroot /path/to/chroot linux32 /bin/zsh 
 +</code> 
 + 
 +or it could be run after chrooting into our new root.  Settings will revert to 
 +normal when we exit the new shell.  One useful option is to change the kernel's 
 +reported version: 
 + 
 +<code> 
 +  chroot /path/to/chroot linux32 --uname-2.6 /bin/zsh 
 +</code> 
 + 
 +That `--uname-2.6' isn't a typo, there has to be a dash between the flag and 
 +the version.  The setarch(8) man page shows all the options. 
 + 
 +-- 
 +Dave 
 + 
 +====== See also ====== 
 + 
 +  * https://wiki.archlinux.org/index.php/Chroot 
 +  * http://www.linuxquestions.org/questions/slackware-installation-40/install-slackware-to-a-folder-using-chroot-825598/#post4093831
  
 ====== Sources ====== ====== Sources ======
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