from /var/log/cobbler/tasks - 2016-08-08_102920_sync.log :

Mon Aug  8 10:29:21 2016 - INFO | running pre-sync triggers
Mon Aug  8 10:29:21 2016 - INFO | cleaning trees
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/www/cobbler/images/ubuntu_bootstrap
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/www/cobbler/images/ubuntu_1404_x86_64
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/www/cobbler/images/centos-x86_64
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/lib/tftpboot/pxelinux.cfg/default
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/lib/tftpboot/grub/images
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/lib/tftpboot/grub/efidefault
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/lib/tftpboot/images/ubuntu_bootstrap
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/lib/tftpboot/images/ubuntu_1404_x86_64
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/lib/tftpboot/images/centos-x86_64
Mon Aug  8 10:29:21 2016 - INFO | removing: /var/lib/tftpboot/s390x/profile_list
Mon Aug  8 10:29:21 2016 - INFO | copying bootloaders
Mon Aug  8 10:29:21 2016 - INFO | copying: /usr/share/syslinux/pxelinux.0 -> /var/lib/tftpboot/pxelinux.0
Mon Aug  8 10:29:21 2016 - INFO | copying: /usr/share/syslinux/menu.c32 -> /var/lib/tftpboot/menu.c32
Mon Aug  8 10:29:21 2016 - INFO | copying: /usr/share/syslinux/memdisk -> /var/lib/tftpboot/memdisk
Mon Aug  8 10:29:21 2016 - INFO | copying distros to tftpboot
Mon Aug  8 10:29:21 2016 - INFO | copying files for distro: centos-x86_64
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/centos/x86_64/isolinux/vmlinuz -> /var/lib/tftpboot/images/centos-x86_64/vmlinuz
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/centos/x86_64/isolinux/initrd.img -> /var/lib/tftpboot/images/centos-x86_64/initrd.img
Mon Aug  8 10:29:21 2016 - INFO | copying files for distro: ubuntu_bootstrap
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/bootstraps/active_bootstrap/vmlinuz -> /var/lib/tftpboot/images/ubuntu_bootstrap/vmlinuz
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/bootstraps/active_bootstrap/initrd.img -> /var/lib/tftpboot/images/ubuntu_bootstrap/initrd.img
Mon Aug  8 10:29:21 2016 - INFO | copying files for distro: ubuntu_1404_x86_64
Mon Aug  8 10:29:21 2016 - INFO | running: /usr/bin/sha1sum /var/www/nailgun/ubuntu/x86_64/images/linux
Mon Aug  8 10:29:21 2016 - INFO | received on stdout: da39a3ee5e6b4b0d3255bfef95601890afd80709  /var/www/nailgun/ubuntu/x86_64/images/linux

Mon Aug  8 10:29:21 2016 - DEBUG | received on stderr:
Mon Aug  8 10:29:21 2016 - DEBUG | trying cachelink /var/www/nailgun/ubuntu/x86_64/images/linux -> /var/lib/tftpboot/images/.link_cache/da39a3ee5e6b4b0d3255bfef95601890afd80709 -> /var/lib/tftpboot/images/ubuntu_1404_x86_64/linux
Mon Aug  8 10:29:21 2016 - INFO | running: /usr/bin/sha1sum /var/www/nailgun/ubuntu/x86_64/images/initrd.gz
Mon Aug  8 10:29:21 2016 - INFO | received on stdout: da39a3ee5e6b4b0d3255bfef95601890afd80709  /var/www/nailgun/ubuntu/x86_64/images/initrd.gz

Mon Aug  8 10:29:21 2016 - DEBUG | received on stderr:
Mon Aug  8 10:29:21 2016 - DEBUG | trying cachelink /var/www/nailgun/ubuntu/x86_64/images/initrd.gz -> /var/lib/tftpboot/images/.link_cache/da39a3ee5e6b4b0d3255bfef95601890afd80709 -> /var/lib/tftpboot/images/ubuntu_1404_x86_64/initrd.gz
Mon Aug  8 10:29:21 2016 - INFO | copying images
Mon Aug  8 10:29:21 2016 - INFO | generating PXE configuration files
Mon Aug  8 10:29:21 2016 - WARNING | warning: kernel option length exceeds 255
Mon Aug  8 10:29:21 2016 - WARNING | warning: kernel option length exceeds 255
Mon Aug  8 10:29:21 2016 - INFO | generating PXE menu structure
Mon Aug  8 10:29:21 2016 - WARNING | warning: kernel option length exceeds 255
Mon Aug  8 10:29:21 2016 - WARNING | warning: kernel option length exceeds 255
Mon Aug  8 10:29:21 2016 - INFO | copying files for distro: centos-x86_64
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/centos/x86_64/isolinux/vmlinuz -> /var/www/cobbler/images/centos-x86_64/vmlinuz
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/centos/x86_64/isolinux/initrd.img -> /var/www/cobbler/images/centos-x86_64/initrd.img
Mon Aug  8 10:29:21 2016 - INFO | Writing template files for centos-x86_64
Mon Aug  8 10:29:21 2016 - INFO | copying files for distro: ubuntu_bootstrap
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/bootstraps/active_bootstrap/vmlinuz -> /var/www/cobbler/images/ubuntu_bootstrap/vmlinuz
Mon Aug  8 10:29:21 2016 - INFO | trying hardlink /var/www/nailgun/bootstraps/active_bootstrap/initrd.img -> /var/www/cobbler/images/ubuntu_bootstrap/initrd.img
Mon Aug  8 10:29:21 2016 - INFO | Writing template files for ubuntu_bootstrap
Mon Aug  8 10:29:21 2016 - INFO | copying files for distro: ubuntu_1404_x86_64
Mon Aug  8 10:29:21 2016 - INFO | trying symlink /var/www/nailgun/ubuntu/x86_64/images/linux -> /var/www/cobbler/images/ubuntu_1404_x86_64/linux
Mon Aug  8 10:29:21 2016 - INFO | trying symlink /var/www/nailgun/ubuntu/x86_64/images/initrd.gz -> /var/www/cobbler/images/ubuntu_1404_x86_64/initrd.gz
Mon Aug  8 10:29:21 2016 - INFO | Writing template files for ubuntu_1404_x86_64
Mon Aug  8 10:29:21 2016 - WARNING | warning: kernel option length exceeds 255
Mon Aug  8 10:29:21 2016 - WARNING | warning: kernel option length exceeds 255
Mon Aug  8 10:29:21 2016 - INFO | rendering DHCP files
Mon Aug  8 10:29:21 2016 - INFO | rendering DNS files
Mon Aug  8 10:29:21 2016 - INFO | rendering TFTPD files
Mon Aug  8 10:29:21 2016 - INFO | generating /etc/xinetd.d/tftp
Mon Aug  8 10:29:21 2016 - INFO | processing boot_files for distro: centos-x86_64
Mon Aug  8 10:29:21 2016 - INFO | processing boot_files for distro: ubuntu_bootstrap
Mon Aug  8 10:29:21 2016 - INFO | processing boot_files for distro: ubuntu_1404_x86_64
Mon Aug  8 10:29:21 2016 - INFO | cleaning link caches
Mon Aug  8 10:29:21 2016 - INFO | running: find /var/lib/tftpboot/images/.link_cache -maxdepth 1 -type f -links 1 -exec rm -f '{}' ';'
Mon Aug  8 10:29:21 2016 - INFO | received on stdout:
Mon Aug  8 10:29:21 2016 - DEBUG | received on stderr:
Mon Aug  8 10:29:21 2016 - INFO | running post-sync triggers
Mon Aug  8 10:29:21 2016 - DEBUG | running python triggers from /var/lib/cobbler/triggers/sync/post/*
Mon Aug  8 10:29:21 2016 - DEBUG | running python trigger cobbler.modules.sync_post_restart_services
Mon Aug  8 10:29:21 2016 - INFO | running: service dnsmasq restart
Mon Aug  8 10:29:21 2016 - INFO | received on stdout:
Mon Aug  8 10:29:21 2016 - DEBUG | received on stderr: Redirecting to /bin/systemctl restart  dnsmasq.service

Mon Aug  8 10:29:21 2016 - DEBUG | running shell triggers from /var/lib/cobbler/triggers/sync/post/*
Mon Aug  8 10:29:21 2016 - DEBUG | running python triggers from /var/lib/cobbler/triggers/change/*
Mon Aug  8 10:29:21 2016 - DEBUG | running python trigger cobbler.modules.scm_track
Mon Aug  8 10:29:21 2016 - DEBUG | running shell triggers from /var/lib/cobbler/triggers/change/*
Mon Aug  8 10:29:21 2016 - INFO | ### TASK COMPLETE ###