[Fedora-livecd-list] Are these error messages serious?

Hello, I created a livecd disk using a kickstart file which I modified from the LXDE spin and got these error messages (at different points of the ISO creation): I wonder if any of these messages are serious. In any case, is there an easy way to get rid of them? Many thanks, Ranjan .... No '/dev/log' or 'logger' included for syslog logging (3 times) .... .... Opening default zone 'public' No changes to default zone needed. Note: Forwarding request to 'systemctl enable NetworkManager.service'. Note: Forwarding request to 'systemctl disable sshd.service'. rm '/etc/systemd/system/multi-user.target.wants/sshd.service' mkfs.fat 3.0.24 (2013-11-23) Loop device does not match a floppy size, using default hd params Initialized /dev/loop1 as a 20 MB HFS Plus volume ERROR:program:umount: /tmp/lorax.imgutils.OtNm0z: target is busy umount: /tmp/lorax.imgutils.OtNm0z: target is busy ERROR:program: (In some cases useful info about processes that (In some cases useful info about processes that ERROR:program: use the device is found by lsof(8) or fuser(1).) use the device is found by lsof(8) or fuser(1).) WARNING:pylorax.imgutils:failed to unmount /tmp/lorax.imgutils.OtNm0z. retrying (1/3)... ERROR:program:umount: /tmp/lorax.imgutils.LTGEmM: target is busy umount: /tmp/lorax.imgutils.LTGEmM: target is busy ERROR:program: (In some cases useful info about processes that (In some cases useful info about processes that ERROR:program: use the device is found by lsof(8) or fuser(1).) use the device is found by lsof(8) or fuser(1).) WARNING:pylorax.imgutils:failed to unmount /tmp/lorax.imgutils.LTGEmM. retrying (1/3)... The unit files have no [Install] section. They are not meant to be enabled using systemctl. Possible reasons for having this kind of units are: 1) A unit may be statically enabled by being symlinked from another unit's .wants/ or .requires/ directory. 2) A unit's purpose may be to act as a helper for some other unit which has a requirement dependency on it. 3) A unit may be started when needed via activation (socket, path, timer, D-Bus, udev, scripted systemctl call, ...). error: /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora: import read failed(2). Packages within this LiveCD .... .... .... Updating index cache for path `/usr/share/man/nl/man1'. Wait.../usr/bin/mandb: warning: /usr/share/man/nl/man1/dos2unix.1.gz: whatis parse for dos2unix(1) failed /usr/bin/mandb: warning: /usr/share/man/nl/man1/dos2unix.1.gz: whatis parse for unix2dos (1) failed /usr/bin/mandb: warning: /usr/share/man/nl/man1/dos2unix.1.gz: whatis parse for unix2mac (1) failed /usr/bin/mandb: warning: /usr/share/man/nl/man1/dos2unix.1.gz: whatis parse for mac2unix (1) failed .... .... cp: cannot stat '/home/maitra/remix/tmp/imgcreate-mHq7up/install_root/usr/share/doc/*-release-*/GPL': No such file or directory ____________________________________________________________ FREE 3D MARINE AQUARIUM SCREENSAVER - Watch dolphins, sharks & orcas on your desktop! Check it out at http://www.inbox.com/marineaquarium