virt-builder.pod: Update Fedora versions

It's that time again.  Update the Fedora versions in examples.

For the index file example, I used Fedora 41 and 42 (which will come out
in April 2025).

Signed-off-by: Kashyap Chamarthy <[email protected]>

Author: kashyapc

builder/virt-builder.pod

@@ -59,13 +59,13 @@ your own too (see below).
 After choosing a guest from the list, you may want to see if there
 are any installation notes:
 
- virt-builder --notes fedora-27
+ virt-builder --notes fedora-41
 
 =head2 Build a virtual machine
 
- virt-builder fedora-27
+ virt-builder fedora-41
 
-will build a Fedora 25 image for the same architecture as virt-builder
+will build a Fedora 41 image for the same architecture as virt-builder
 (so running it from an i686 installation will try to build an i686
 image, if available).  This will have all default
 configuration (minimal size, no user accounts, random root password,
@@ -77,33 +77,33 @@ The first time this runs it has to download the template over the
 network, but this gets cached (see L</CACHING>).
 
 The name of the output file is derived from the template name, so
-above it will be F<fedora-27.img>.  You can change the output filename
+above it will be F<fedora-41.img>.  You can change the output filename
 using the I<-o> option:
 
- virt-builder fedora-27 -o mydisk.img
+ virt-builder fedora-41 -o mydisk.img
 
 You can also use the I<-o> option to write to existing devices or
 logical volumes.
 
- virt-builder fedora-27 --format qcow2
+ virt-builder fedora-41 --format qcow2
 
-As above, but write the output in qcow2 format to F<fedora-27.qcow2>.
+As above, but write the output in qcow2 format to F<fedora-41.qcow2>.
 
- virt-builder fedora-27 --size 20G
+ virt-builder fedora-41 --size 20G
 
 As above, but the output size will be 20 GB.  The guest OS is resized
 as it is copied to the output (automatically, using
 L<virt-resize(1)>).
 
- virt-builder fedora-27 --arch i686
+ virt-builder fedora-41 --arch i686
 
 As above, but using an i686 template, if available.
 
 =head2 Setting the root password
 
- virt-builder fedora-27 --root-password file:/tmp/rootpw
+ virt-builder fedora-41 --root-password file:/tmp/rootpw
 
-Create a Fedora 25 image.  The root password is taken from the file
+Create a Fedora 41 image.  The root password is taken from the file
 F</tmp/rootpw>.
 
 Note if you I<don’t> set I<--root-password> then the guest is given
@@ -113,7 +113,7 @@ You can also create user accounts.  See L</USERS AND PASSWORDS> below.
 
 =head2 Set the hostname
 
- virt-builder fedora-27 --hostname virt.example.com
+ virt-builder fedora-41 --hostname virt.example.com
 
 Set the hostname to C<virt.example.com>.
 
@@ -122,7 +122,7 @@ Set the hostname to C<virt.example.com>.
 To install packages from the ordinary (guest) software repository
 (eg. dnf or apt):
 
- virt-builder fedora-27 --install "inkscape,@Xfce Desktop"
+ virt-builder fedora-41 --install "inkscape,@Xfce Desktop"
 
 (In Fedora, C<@> is used to install groups of packages.  On Debian
 you would install a meta-package instead.)
@@ -147,18 +147,18 @@ For example:
  dnf -y --best update
  EOF
 
- virt-builder fedora-27 --firstboot /tmp/dnf-update.sh
+ virt-builder fedora-41 --firstboot /tmp/dnf-update.sh
 
 or simply:
 
- virt-builder fedora-27 --firstboot-command 'dnf -y --best update'
+ virt-builder fedora-41 --firstboot-command 'dnf -y --best update'
 
 which makes the L<dnf(8)> C<update> command run once the first time
 the guest boots.
 
 Or:
 
- virt-builder fedora-27 \
+ virt-builder fedora-41 \
    --edit '/etc/dnf/dnf.conf:
              s/gpgcheck=1/gpgcheck=0/'
 
@@ -559,7 +559,7 @@ If the guest OS you are installing is similar to the host OS (eg.
 both are Linux), and if libguestfs supports network connections, then
 you can use I<--install> to install packages like this:
 
- virt-builder fedora-27 --install inkscape
+ virt-builder fedora-41 --install inkscape
 
 This uses the guest’s package manager and the host’s network
 connection.
@@ -568,7 +568,7 @@ connection.
 
 To update the installed packages in the template at build time:
 
- virt-builder fedora-27 --update
+ virt-builder fedora-41 --update
 
 Most of the templates that ship with virt-builder come with a very
 minimal selection of packages (known as a "JEOS" or "Just Enough
@@ -580,7 +580,7 @@ OS from the template.  This option updates those template packages.
 
 Another option is to install the packages when the guest first boots:
 
- virt-builder fedora-27 --firstboot-install inkscape
+ virt-builder fedora-41 --firstboot-install inkscape
 
 This uses the guest’s package manager and the guest’s network
 connection.
@@ -628,7 +628,7 @@ For apt, create /tmp/install.sh containing:
 Use the I<--attach> option to attach the CD / disk image and the
 I<--run> option to run the script:
 
- virt-builder fedora-27 \
+ virt-builder fedora-41 \
    --attach extra-packages.iso \
    --run /tmp/install.sh
 
@@ -707,7 +707,7 @@ keyboard for some common Linux distributions.
 
 For distros that use systemd C<localectl>, use a command like this:
 
- virt-builder fedora-27 \
+ virt-builder fedora-41 \
    --firstboot-command 'localectl set-keymap uk'
 
 See L<localectl(1)> and
@@ -749,9 +749,9 @@ of virt-builder to do this.
 
 This section contains examples for some common Linux distributions.
 
-=head3 Setting Japanese in Fedora 25
+=head3 Setting Japanese in Fedora 41
 
- virt-builder fedora-27 \
+ virt-builder fedora-41 \
    --size 20G \
    --update \
    --install @japanese-support \
@@ -1014,7 +1014,7 @@ tools probably work differently as well.
 
 Import the image into Glance (the OpenStack image store) by doing:
 
- glance image-create --name fedora-27-image --file fedora-27.img \
+ glance image-create --name fedora-41-image --file fedora-41.img \
    --disk-format raw --container-format bare \
    --is-public True
 
@@ -1024,12 +1024,12 @@ parameter should match virt-builder’s I<--format> option (or C<raw> if
 you didn't use that option).  The I<--container-format> should always
 be C<bare> since virt-builder doesn't put images into containers.
 
-You can use the S<C<glance image-show I<fedora-27-image>>> command to
+You can use the S<C<glance image-show I<fedora-41-image>>> command to
 display the properties of the image.
 
 To boot up an instance of your image on a Nova compute node, do:
 
- nova boot fedora-27-server --image fedora-27-image \
+ nova boot fedora-41-server --image fedora-41-image \
    --flavor m1.medium
 
 Use S<C<nova flavor-list>> to list possible machine flavors.  Use
@@ -1060,7 +1060,7 @@ at boot.
 
 A typical virt-builder command would be:
 
- virt-builder fedora-27 \
+ virt-builder fedora-41 \
    --hostname client.example.com \
    --update \
    --install puppet \
@@ -1294,22 +1294,22 @@ options (see L<nbdkit-xz-plugin(1)> for further explanation):
 The index file has a simple text format (shown here without the
 digital signature):
 
- [fedora-18]
- name=Fedora® 18
- osinfo=fedora18
+ [fedora-41]
+ name=Fedora® 41
+ osinfo=fedora41
  arch=x86_64
- file=fedora-18.xz
+ file=fedora-41.xz
  checksum[sha512]=...
  format=raw
  size=6442450944
  compressed_size=148947524
  expand=/dev/sda3
 
- [fedora-19]
- name=Fedora® 19
- osinfo=fedora19
+ [fedora-42]
+ name=Fedora® 42
+ osinfo=fedora42
  arch=x86_64
- file=fedora-19.xz
+ file=fedora-42.xz
  checksum[sha512]=...
  revision=3
  format=raw
@@ -1584,7 +1584,7 @@ package manager at that.
 
 To install a Fedora guest using a local mirror:
 
- virt-builder fedora-27 \
+ virt-builder fedora-41 \
    --edit '/etc/yum.repos.d/fedora.repo:
        s{.*baseurl=.*}{baseurl=http://example.com/mirror/};
        s{.*metalink=.*}{};