diff --git a/homepage/knowledge/software.html b/homepage/knowledge/software.html
index d24442b..996cb16 100644
--- a/homepage/knowledge/software.html
+++ b/homepage/knowledge/software.html
@@ -328,17 +328,28 @@ Supplies <CODE>lspci(8)</CODE>, <CODE>setpci(8)</CODE>, and <CODE>update-pciids(
 </UL>
 <H3>Battery</H3>
 <P><CODE>envstat(1)</CODE> can show the current battery status.</P>
-<H3>Mounting ext4 partitions with FUSE</H3>
+<H3>Mounting filesystems</H3>
 <OL>
-<LI>Install <CODE>filesystems/fuse</CODE> and <CODE>filesystems/fuse-ext2</CODE>.</LI>
-<LI>Connect the drive with the ext4 partition you want to access.</LI>
+<LI>Connect the drive with the filesystem you want to access.</LI>
 <LI>Use <CODE>dmesg(8)</CODE> to determine the location in <CODE>/dev/</CODE> of the disk.</LI>
-<LI>Use <CODE>disklabel(8)</CODE> to determine which partition on the disk you want to access (<CODE>disklabel /dev/<I>disk</I></CODE>)
-- it will be listed with the partition type "Linux Ext2" even though the partition may be ext4.</LI>
-<LI>Use <CODE>fuse-ext2(1)</CODE> to mount the partition (<CODE>fuse-ext2 /dev/<I>disk with partition letter</I> <I>mountpoint</I></CODE>
-- for example, <CODE>fuse-ext2 /dev/sd1e /mnt/sd1</CODE> to mount partition <I>e</I> of device <I>sd1</I> to the mountpoint <I>/mnt/sd1</I>).</LI>
-<LI>This mountpoint can be unmounted with <CODE>umount(8)</CODE> as normal.</LI>
+<LI><CODE>disklabel(8)</CODE> the drive to determine which partition on the disk you want to access (<CODE>disklabel /dev/<I>disk</I></CODE>)</LI>
+<LI><CODE>mount(8)</CODE> the filesystem.</LI>
+<LI><CODE>umount(8)</CODE> the filesystem when done using it.</LI>
 </OL>
+<H4>ext4</H4>
+<P>
+Install <CODE>filesystems/fuse</CODE> and <CODE>filesystems/fuse-ext2</CODE>.
+<CODE>disklabel(8)</CODE> will list ext4 filesystems as of type "Linux Ext2".
+Use <CODE>fuse-ext2(1)</CODE> to mount the filesystem.
+</P>
+<P>
+<CODE>fuse-ext2(1)</CODE> is spotty in places and may not work correctly.
+</P>
+<H4>exFAT</H4>
+<P>
+Install <CODE>filesystems/fuse</CODE> and <CODE>filesystems/fuse-exfat</CODE>.
+Use <CODE>mount.exfat</CODE> to mount the filesystem (the manual page for which is <CODE>mount.exfat-fuse(8)</CODE>).
+</P>
 <H3>Fix <CODE>SSL certificate problem: unable to get local issuer certificate</CODE></H3>
 <UL>
 <LI><A HREF="http://mail-index.netbsd.org/pkgsrc-users/2021/07/19/msg034147.html">Depending on security/ca-certificates?</A></LI>
@@ -366,6 +377,18 @@ These leave your system open to man-in-the-middle attacks.
 <LI><A HREF="https://www.unitedbsd.com/d/110-upgrading-netbsd-using-sysinst">Upgrading NetBSD using sysinst</A></LI>
 </UL>
 
+<H2 ID="pkgsrc">pkgsrc</H2>
+<UL>
+<LI><A HREF="http://www.netbsd.org/docs/pkgsrc/"</A>the pkgsrc user's guide</A></LI>
+</UL>
+<H3>Upgrading packages</H3>
+<UL>
+<LI><A HREF="http://www.netbsd.org/docs/pkgsrc/using.html">Using pkgsrc</A> (the pkgsrc user's guide)</LI>
+<LI><A HREF="https://wiki.netbsd.org/cgi-bin/cvsweb/wikisrc/pkgsrc/how_to_upgrade_packages.mdwn?rev=1.9;content-type=text%2Fx-cvsweb-markup">how to upgrade packages</A> (NetBSD Developer Wiki <B>snapshot; 2020-09-09</B>)</LI>
+</UL>
+<P>
+See <CODE>pkgtools/pkg_rolling_replace</CODE>.
+</P>
 
 <H2 ID="power">Power</H2>
 <P>Much of this can be configured in the ACPI settings in your <A HREF="#login_manager">login manager</A>, provided you have one running that can do this.</P>