updating live CD: does it result in more up-to-date installations?

[D. Hugh Redelmeier]

| From: Bruno Wolff III <bruno at wolff.to>

| On Mon, Jul 08, 2013 at 12:16:29 -0400,
|   "D. Hugh Redelmeier" <hugh at mimosa.com> wrote:

| >If I install from this stick, will the installed system be already
| >updated?

| The way things currently work the anwser is yes. The file system is
| essentially copied off the live image for live installs. (Note that updating a
| kernel on a live image doesn't change the kernel being booted when using the
| live image.)

Great!

Now I've discovered a problem with my Live USB system: yum is now
unhappy.

    [liveuser at localhost ~]$ sudo yum update
    Loaded plugins: langpacks, refresh-packagekit
    fedora/19/x86_64/metalink                                |  25 kB     00:00     
    Could not parse metalink https://mirrors.fedoraproject.org/metalink?repo=fedora-19&arch=x86_64 error was 
    No repomd file
    Error: File /var/cache/yum/x86_64/19/fedora/metalink.xml does not exist

I wonder how that happened.  It isn't that the overlay is full:

    [liveuser at localhost ~]$ sudo msetup status
    live-osimg-min: 0 16777216 snapshot 4576/4576 32
    live-rw: 0 16777216 snapshot 4228920/8386560 16464

I did shut the live system down properly after the update.