replace commands parsing ls output with shell glob

Signed-off-by: Maurice Zhou <jasper@apvc.uk>

docs/Getting Started/Fedora/Root on ZFS/3-system-configuration.rst

@@ -101,7 +101,7 @@ System Configuration
 
 #. Build ZFS modules::
 
-    ls -1 /lib/modules \
+    for directory in /lib/modules/*; do
-    | while read kernel_version; do
+      kernel_version=$(basename $directory)
       dkms autoinstall -k $kernel_version
-      done
+    done

docs/Getting Started/Fedora/Root on ZFS/5-bootloader.rst

@@ -49,10 +49,10 @@ Install GRUB
     touch /etc/zfs/zpool.cache
     chmod a-w /etc/zfs/zpool.cache
     chattr +i /etc/zfs/zpool.cache
-    ls -1 /lib/modules \
+    for directory in /lib/modules/*; do
-    | while read kernel_version; do
+      kernel_version=$(basename $directory)
       dracut --force --kver $kernel_version
-      done
+    done
 
 #. Disable BLS::
 

docs/Getting Started/Fedora/index.rst

@@ -49,13 +49,16 @@ see below.
 
     modprobe zfs
 
-   It might be necessary to rebuild module::
+   It might be necessary to rebuild ZFS module::
 
-    ls -1 /lib/modules \
+    for directory in /lib/modules/*; do
-    | while read kernel_version; do
+      kernel_version=$(basename $directory)
       dkms autoinstall -k $kernel_version
     done
 
+   If for some reason, ZFS kernel module is not successfully built,
+   you can also run the above command to debug the problem.
+
 #. By default ZFS kernel modules are loaded upon detecting a pool.
    To always load the modules at boot::
 

docs/Getting Started/RHEL-based distro/RHEL 8-based distro Root on ZFS/3-system-configuration.rst

@@ -97,7 +97,7 @@ System Configuration
 
 #. Build ZFS modules::
 
-    ls -1 /lib/modules \
+    for directory in /lib/modules/*; do
-    | while read kernel_version; do
+      kernel_version=$(basename $directory)
       dkms autoinstall -k $kernel_version
-      done
+    done

docs/Getting Started/RHEL-based distro/RHEL 8-based distro Root on ZFS/5-bootloader.rst

@@ -49,10 +49,10 @@ Install GRUB
     touch /etc/zfs/zpool.cache
     chmod a-w /etc/zfs/zpool.cache
     chattr +i /etc/zfs/zpool.cache
-    ls -1 /lib/modules \
+    for directory in /lib/modules/*; do
-    | while read kernel_version; do
+      kernel_version=$(basename $directory)
       dracut --force --kver $kernel_version
-      done
+    done
 
 #. Load ZFS modules and disable BLS::
 

docs/Getting Started/RHEL-based distro/index.rst

@@ -109,6 +109,16 @@ time you must create an ``/etc/modules-load.d/zfs.conf`` file::
    After upgrading users must uninstall OpenZFS and then reinstall it
    from the matching repository as described in this section.
 
+It might be necessary to rebuild ZFS module::
+
+ for directory in /lib/modules/*; do
+   kernel_version=$(basename $directory)
+   dkms autoinstall -k $kernel_version
+ done
+
+If for some reason, ZFS kernel module is not successfully built,
+you can also run the above command to debug the problem.
+
 Testing Repositories
 --------------------