I did some more research to see what differences there are between the livecd build that works and one that fails. The liveCD that succeeds is the following: livecd-creator --repo=c6,http://download.fedora.redhat.com/pub/fedora/linux/core/6/i386/os/ --repo=c6di,http://download.fedora.redhat.com/pub/fedora/linux/core/6/i386/debug/ --repo=c6_upd,http://download.fedora.redhat.com/pub/fedora/linux/core/updates/6/i386/ --repo=c6_updi,http://download.fedora.redhat.com/pub/fedora/linux/core/updates/6/i386/debug/ --repo=lcd6,http://people.redhat.com/davidz/livecd/i386/ --repo=e6,http://download.fedora.redhat.com/pub/fedora/linux/extras/6/i386/ --package=fedora-livecd-gnome --package=kernel-debuginfo --fslabel=Fedora-6-Zod-LiveCD-1-stap2a >& livecd-stap2a.log & The livecd that fails has an additional package, systemtap: livecd-creator --repo=c6,http://download.fedora.redhat.com/pub/fedora/linux/core/6/i386/os/ --repo=c6di,http://download.fedora.redhat.com/pub/fedora/linux/core/6/i386/debug/ --repo=c6_upd,http://download.fedora.redhat.com/pub/fedora/linux/core/updates/6/i386/ --repo=c6_updi,http://download.fedora.redhat.com/pub/fedora/linux/core/updates/6/i386/debug/ --repo=lcd6,http://people.redhat.com/davidz/livecd/i386/ --repo=e6,http://download.fedora.redhat.com/pub/fedora/linux/extras/6/i386/ --package=fedora-livecd-gnome --package=kernel-debuginfo --package=systemtap --fslabel=Fedora-6-Zod-LiveCD-1-stap2 >& livecd-stap2.log & Looking through the information about what is installed. From the log file for the livecd WITHOUT systemtap the following things are going to be installed ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: fedora-livecd-gnome i386 6-1 lcdr_lcd6 2.5 M kernel-debuginfo i686 2.6.19-1.2911.fc6 lcdr_c6_updi 162 M Installing for dependencies: fedora-livecd i386 6-1 lcdr_lcd6 3.3 k kernel-debuginfo-common i686 2.6.19-1.2911.fc6 lcdr_c6_updi 28 M Transaction Summary ============================================================================= Install 4 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 192 M It looks like systemtap package pulls in a lot of additional packages, including the appropriate kernel, kernel-2.6.20-1.2911. The attached packages.diff show the additional packages that are installed by the second round of yum. The i2.log (the livecd with systemtap) tries to install the kernel-2.6.20-1.2895, which it shouldn't be given that a newer version of the kernel is already installed. Davidz suggest adding "--package=kernel" to the commandline, but that doesn't make a difference. ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: fedora-livecd-gnome i386 6-1 lcdr_lcd6 2.5 M kernel-debuginfo i686 2.6.19-1.2911.fc6 lcdr_c6_updi 162 M systemtap i386 0.5.12-1.fc6 lcdr_c6_upd 584 k Installing for dependencies: MAKEDEV i386 3.23-1.2 lcdr_c6 135 k SysVinit i386 2.86-14 lcdr_c6 112 k audit-libs i386 1.4.2-2.fc6 lcdr_c6_upd 57 k basesystem noarch 8.0-5.1.1 lcdr_c6 2.8 k bash i386 3.1-16.1 lcdr_c6 1.8 M binutils i386 2.17.50.0.6-2.fc6 lcdr_c6_upd 2.9 M bzip2-libs i386 1.0.3-6.fc6 lcdr_c6_upd 37 k chkconfig i386 1.3.30-1 lcdr_c6 152 k coreutils i386 5.97-12.3.fc6 lcdr_c6_upd 3.6 M cpio i386 2.6-21.fc6 lcdr_c6_upd 126 k cpp i386 4.1.1-51.fc6 lcdr_c6_upd 2.6 M cracklib i386 2.8.9-3.1 lcdr_c6 58 k cracklib-dicts i386 2.8.9-3.1 lcdr_c6 3.3 M db4 i386 4.3.29-9.fc6 lcdr_c6 916 k device-mapper i386 1.02.13-1.fc6 lcdr_c6_upd 561 k dmraid i386 1.0.0.rc13-1.fc6 lcdr_c6 554 k e2fsprogs i386 1.39-7.fc6 lcdr_c6_upd 955 k e2fsprogs-libs i386 1.39-7.fc6 lcdr_c6_upd 113 k elfutils-libelf i386 0.126-1.fc6 lcdr_c6_upd 53 k elfutils-libs i386 0.126-1.fc6 lcdr_c6_upd 106 k ethtool i386 3-1.2.2 lcdr_c6 55 k fedora-livecd i386 6-1 lcdr_lcd6 3.3 k fedora-release noarch 6-4 lcdr_c6 28 k fedora-release-notes noarch 6-3 lcdr_c6 765 k filesystem i386 2.4.0-1 lcdr_c6 116 k findutils i386 1:4.2.27-4.1 lcdr_c6 293 k gawk i386 3.1.5-14.fc6 lcdr_c6_upd 1.7 M gcc i386 4.1.1-51.fc6 lcdr_c6_upd 4.9 M gdbm i386 1.8.0-26.2.1 lcdr_c6 27 k glib2 i386 2.12.9-1.fc6 lcdr_c6_upd 698 k glibc i686 2.5-10.fc6 lcdr_c6_upd 5.1 M glibc-common i386 2.5-10.fc6 lcdr_c6_upd 16 M glibc-devel i386 2.5-10.fc6 lcdr_c6_upd 2.0 M glibc-headers i386 2.5-10.fc6 lcdr_c6_upd 605 k grep i386 2.5.1-54.1.2.fc6 lcdr_c6_upd 174 k gzip i386 1.3.5-9 lcdr_c6 100 k info i386 4.8-14.fc6 lcdr_c6_upd 172 k initscripts i386 8.45.7-1 lcdr_c6_upd 1.3 M iproute i386 2.6.19-1.fc6 lcdr_c6_upd 811 k iputils i386 20020927-41.fc6 lcdr_c6 158 k kernel i686 2.6.19-1.2911.fc6 lcdr_c6_upd 16 M kernel-debuginfo-common i686 2.6.19-1.2911.fc6 lcdr_c6_updi 28 M kernel-headers i386 2.6.19-1.2911.fc6 lcdr_c6_upd 701 k kpartx i386 0.4.7-5 lcdr_c6 380 k krb5-libs i386 1.5-13 lcdr_c6_upd 590 k less i386 394-5.fc6 lcdr_c6_upd 100 k libacl i386 2.2.39-1.1 lcdr_c6 19 k libattr i386 2.4.32-1.1 lcdr_c6 12 k libcap i386 1.10-25 lcdr_c6 22 k libgcc i386 4.1.1-51.fc6 lcdr_c6_upd 81 k libgomp i386 4.1.1-51.fc6 lcdr_c6_upd 69 k libselinux i386 1.33.4-2.fc6 lcdr_c6_upd 94 k libsepol i386 1.15.3-1.fc6 lcdr_c6_upd 129 k libstdc++ i386 4.1.1-51.fc6 lcdr_c6_upd 349 k libtermcap i386 2.0.8-46.1 lcdr_c6 14 k lvm2 i386 2.02.17-1.fc6 lcdr_c6_upd 1.0 M make i386 1:3.81-1.1 lcdr_c6 465 k mcstrans i386 0.1.8-3 lcdr_c6 15 k mingetty i386 1.07-5.2.2 lcdr_c6 19 k mkinitrd i386 5.1.19.0.2-1 lcdr_c6_upd 438 k mktemp i386 3:1.5-23.2.2 lcdr_c6 14 k module-init-tools i386 3.3-0.pre1.4.17 lcdr_c6 399 k nash i386 5.1.19.0.2-1 lcdr_c6_upd 1.1 M ncurses i386 5.5-24.20060715 lcdr_c6 1.1 M net-tools i386 1.60-73 lcdr_c6 359 k openssl i686 0.9.8b-8.3.fc6 lcdr_c6_upd 1.4 M pam i386 0.99.6.2-3.16.fc6 lcdr_c6_upd 924 k pcre i386 6.6-1.1 lcdr_c6 111 k perl i386 4:5.8.8-10 lcdr_c6 12 M popt i386 1.10.2-32 lcdr_c6 67 k procps i386 3.2.7-8.2.fc6 lcdr_c6_upd 207 k psmisc i386 22.2-5 lcdr_c6 61 k python i386 2.4.4-1.fc6 lcdr_c6_upd 5.9 M readline i386 5.1-1.1 lcdr_c6 223 k sed i386 4.1.5-5.fc6 lcdr_c6 175 k setup noarch 2.6.1.1-1.fc6 lcdr_c6_upd 126 k shadow-utils i386 2:4.0.17-12.fc6 lcdr_c6_upd 1.0 M sysklogd i386 1.4.1-41.fc6 lcdr_c6_upd 73 k systemtap-runtime i386 0.5.12-1.fc6 lcdr_c6_upd 16 k tar i386 2:1.15.1-24.fc6 lcdr_c6_upd 750 k termcap noarch 1:5.5-1.20060701.1 lcdr_c6 265 k tzdata noarch 2007c-1.fc6 lcdr_c6_upd 753 k udev i386 095-17.fc6 lcdr_c6_upd 877 k util-linux i386 2.13-0.46.fc6 lcdr_c6_upd 1.8 M zlib i386 1.2.3-3 lcdr_c6 50 k Transaction Summary ============================================================================= Install 88 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 296 M -Will

William Cohen wrote: If anyone is interested, an example CD made to play with SystemTap is available at: ftp://sourceware.redhat.com/pub/systemtap/livecds/Fedora-6-systemtap-2007... -Will