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20f8c8e774
ap/vim-8.2.4649-x86_64-1.txz: Upgraded.
Fixes a use-after-free in utf_ptr2char in vim/vim prior to 8.2.4646.
This vulnerability is capable of crashing software, bypassing protection
mechanisms, modifying memory, and possibly execution of arbitrary code.
Thanks to marav for the heads-up.
For more information, see:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1154
https://huntr.dev/bounties/7f0ec6bc-ea0e-45b0-8128-caac72d23425
b55986c52d
(* Security fix *)
d/cmake-3.23.0-x86_64-1.txz: Upgraded.
d/meson-0.61.4-x86_64-1.txz: Upgraded.
l/harfbuzz-4.2.0-x86_64-1.txz: Upgraded.
l/libcap-ng-0.8.3-x86_64-1.txz: Upgraded.
l/mlt-7.6.0-x86_64-1.txz: Upgraded.
x/xdg-desktop-portal-1.14.2-x86_64-1.txz: Upgraded.
xap/vim-gvim-8.2.4649-x86_64-1.txz: Upgraded.
189 lines
8.5 KiB
Text
189 lines
8.5 KiB
Text
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Installing Slackware on Logical volumes
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=======================================
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Introduction
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------------
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For a long time, it has been common for other distros to support
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installation to Logical Volumes. In Slackware, the installer has never
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supported this, but the gurus usually would find a way to create logical
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volumes and install or migrate their Slackware onto those. Having your
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Slackware installed fully on LVM was near impossible until Slackware 12.0,
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but now Slackware has improved support for LVM built into the installer.
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Preparing Logical Volumes (LV)
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------------------------------
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* Existing LV
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The Slackware installer will recognize and activate any pre-existing
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Logical Volumes on your hard drive(s). These Logical Volumes will be
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selectable targets for the creation of the filesystems (like /, /usr, /home,
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/var)
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* New LV
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When you need to create the LV, you need to do this before starting the
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'setup' program. You may have to run (c)fdisk first to create the partition
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you want to use for setting up the logical volumes. For any partition you
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create and that you want to use for LVM, you should set the partition type
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to '8e' (Linux LVM).
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In the next example, I will assume we use a single 20 GB partition
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'/dev/sda1' for our Volume Group (VG). With LVM, it is possible to use
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multiple physical volumes (i.e. partitions, whole disks) for a VG, but that is
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left as an exercise for the reader. You can always add extra physical volumes
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to your VG later. We will create a VG called 'myvg' and on that VG create two
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LV's called 'root' and 'home'. The first is going to contain the root partition
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('/') and the second will become our '/home' partition.
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After booting your computer from the Slackware CD/DVD/USB, and logging in
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as root, you run the following sequence of commands to create the Physical
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Volume (PV), the Volume Group (VG) within that PV and two LV's of size 15GB
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(root) and 4GB (home) inside the VG:
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# pvcreate /dev/sda1
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# vgcreate myvg /dev/sda1
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# lvcreate -L 15G -n root myvg
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# lvcreate -L 4G -n home myvg
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========================================================================
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NOTE: if you want, you can just allocate all remaining space inside the
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VG to a Logical Volume. Suppose we want to allocate all available
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space to our 'home' LV, then this will the command to use instead
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of the previous one (note the use of '-l' instead of '-L'):
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# lvcreate -l 100%FREE -n home myvg
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========================================================================
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The device nodes for the logical volumes are created, and the volumes
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will be activated automatically when running lvcreate.
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This is all we need to do before running 'setup'.
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Using LVM during setup
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----------------------
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In setup, when you choose "TARGET" in the main menu, you will notice that
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the LV's are available in the Linux partition selection. Our two LV's "root"
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and "home" are visible as "/dev/myvg/root" and "/dev/myvg/home". Select the
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first for your root ('/') filesystem, and the other for your /home filesystem.
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Create any filesystem you like on them. My favorite fstype still is ext4,
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but you can choose others such as btrfs, jfs, or xfs.
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Setup will proceed as usual, but when you get to the point where you are
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presented with the lilo configuration dialog, it is almost time to perform
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one final manual tweak. Proceed with configuring your lilo as usual, and
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select '/dev/myvg/root' as your root filesystem to boot. When you install
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lilo, it will probably not complain, but be aware that having your root
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filesystem on a Logical Volume requires an initial ramdisk (initrd). The
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Slackware installer will not create it for you, and this requires some
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manual intervention after the setup program has finished and you've been
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returned to the command prompt. For now, you can continue with the Slackware
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setup as usual, but at the end, do not reboot just yet!
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At the end of the setup program it will prompt you to select "EXIT" and
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press 'Ctrl-Alt-Del' to reboot the computer. Exit the menu but DO NOT
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reboot just yet! At this point, we are going to create our initrd image.
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Fortunately, the Slackware installer has done some of the work for us.
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It will have created the LVM device nodes which lilo needs in order to
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install successfully. The installer will have mounted the /sys and /proc
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filesystems as well. Inside a 'chroot' we will create an initrd image
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and configure lilo to use it with the generic kernel.
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We are going to 'chroot' into our fresh installation:
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# chroot /mnt
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Next, while we are in the chroot, create the initrd with LVM support -
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in the example command line I assume that the root filesystem is 'ext4',
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we used the LV '/dev/myvg/root' as the root device, and are running the
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Slackware 15.0 default kernel '5.15.19':
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# mkinitrd -c -k 5.15.19 -m ext4 -f ext4 -r /dev/myvg/root -L
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The resulting initrd image will be written to the file '/boot/initrd.gz'
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by default. We still need to tell lilo about this initrd, so open the
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configuration file '/etc/lilo.conf' in an editor such as vi or pico - it
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should already have been generated by the 'liloconfig' part of setup. Look
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for the "Linux bootable partition config" and add a line for the initrd.
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Additionally, we change the filename of the kernel to be used. The default
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filename added by 'liloconfig' is '/boot/vmlinuz' which is a symbolic link to
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the huge SMP kernel. Remember that we need a 'generic' kernel with the initrd.
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The end result should look somewhat like this:
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image = /boot/vmlinuz-generic-5.15.19
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initrd = /boot/initrd.gz
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root = /dev/myvg/root
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label = linux
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read-only
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Double-check that the label you are using ('linux' in the above example)
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is unique in the /etc/lilo.conf file. If you are satisfied that everything
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looks OK, write the changes, exit the editor and (re-) run lilo while in
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the chroot. Lilo will issue a couple of warnings concerning a difference in
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what /proc/partitions reports and what lilo thinks are available partitions,
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but it is safe to ignore these.
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=====================================================================
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An alternative method of creating the commandline for mkinitrd is
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to use the '/usr/share/mkinitrd/mkinitrd_command_generator.sh' script
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which is part of the mkinitrd package. This script will analyze your
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Slackware installation and show you a useable 'mkinitrd' commandline:
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# /usr/share/mkinitrd/mkinitrd_command_generator.sh -r
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The above command would emit a commandline (almost) exactly as I
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showed earlier in this README. If you are satisfied that it is the
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correct command for you, then there is no need to type it manually;
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just enclose the above line in "$()" which will actually run the command
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and create your initrd:
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# $( /usr/share/mkinitrd/mkinitrd_command_generator.sh -r )
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All that is left then is to update /etc/lilo.conf and run 'lilo'.
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=====================================================================
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You're done in the chroot now. Exit the chroot by running the command
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'exit' and return the original console prompt (not that this looks any
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different from the prompt inside the 'chroot' environment!).
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This completes the installation of Slackware. Good luck with your fresh
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'Slackware with a root filesystem-on-LVM' !
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A word about using a Logical Volume for SWAP
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--------------------------------------------
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The setup program is able to detect a Logical Volume and use it as a swap
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partition, on the condition that you have manually formatted the LV as
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swap before you start 'setup'. That way, you will be able to select it as a
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usable swap partition in the ADDSWAP section. The setup program will inspect
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all your logical volumes for a swap header. Here is how you create the LV,
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assuming you already created the Volume Group 'myvg' earlier - see above -
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and left enough unallocated space in that VG:
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# lvcreate -L 1G -n swap myvg
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This command creates a 1 GB large Logical Volume called 'swap' (but any
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name will do) in the 'myvg' Volume Group. Next, format the volume for
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use as swap partition:
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# mkswap /dev/myvg/swap
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This is enough to get it recognized by the setup program. Have fun!
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========================================================
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Author:
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Eric Hameleers <alien@slackware.com> 13-oct-2013
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Wiki URLs:
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http://www.slackware.com/~alien/dokuwiki/doku.php?id=slackware:setup
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Documentation:
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/usr/doc/Linux-HOWTOs/LVM-HOWTO
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