I got an error while installing

[lukemarsden]

-auto-removal 3.13.0-68-generic /boot/vmlinuz-3.13.0-68-generic\nrun-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-68-generic /boot/vmlinuz-3.13.0-68-generic\nupdate-initramfs: Generating /boot/initrd.img-3.13.0-68-generic\nrun-parts: executing /etc/kernel/postinst.d/update-notifier 3.13.0-68-generic /boot/vmlinuz-3.13.0-68-generic\nrun-parts: executing /etc/kernel/postinst.d/x-grub-legacy-ec2 3.13.0-68-generic /boot/vmlinuz-3.13.0-68-generic\nSearching for GRUB installation directory ... found: /boot/grub\nSearching for default file ... found: /boot/grub/default\nTesting for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst\nSearching for splash image ... none found, skipping ...\nFound kernel: /boot/vmlinuz-3.13.0-68-generic\nFound kernel: /boot/vmlinuz-3.13.0-63-generic\nUpdating /boot/grub/menu.lst ... done\n\nrun-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.13.0-68-generic /boot/vmlinuz-3.13.0-68-generic\nGenerating grub configuration file ...\nFound linux image: /boot/vmlinuz-3.13.0-68-generic\nFound initrd image: /boot/initrd.img-3.13.0-68-generic\nFound linux image: /boot/vmlinuz-3.13.0-63-generic\nFound initrd image: /boot/initrd.img-3.13.0-63-generic\ndone\nSetting up linux-image-generic (3.13.0.68.74) ...\nSetting up linux-image-extra-virtual (3.13.0.68.74) ...\nProcessing triggers for libc-bin (2.19-0ubuntu6.6) ...\napparmor is enabled in the kernel and apparmor utils were already installed\n+ sh -c apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D\nExecuting: gpg --ignore-time-conflict --no-options --no-default-keyring --homedir /tmp/tmp.zElBuoz6Wt --no-auto-check-trustdb --trust-model always --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D\ngpg: requesting key 2C52609D from hkp server p80.pool.sks-keyservers.net\ngpg: key 2C52609D: public key "Docker Release Tool (releasedocker) [email protected]" imported\ngpg: Total number processed: 1\ngpg: imported: 1 (RSA: 1)\n+ sh -c mkdir -p /etc/apt/sources.list.d\n+ sh -c echo deb https://apt.dockerproject.org/repo ubuntu-trusty main > /etc/apt/sources.list.d/docker.list\n+ sh -c sleep 3; apt-get update; apt-get install -y -q docker-engine\nIgn http://us-east-1.ec2.archive.ubuntu.com trusty InRelease\nHit http://us-east-1.ec2.archive.ubuntu.com trusty-updates InRelease\nHit http://us-east-1.ec2.archive.ubuntu.com trusty Release.gpg\nHit http://us-east-1.ec2.archive.ubuntu.com trusty Release\nHit http://us-east-1.ec2.archive.ubuntu.com trusty-updates/main Sources\nHit http://us-east-1.ec2.archive.ubuntu.com trusty-updates/universe Sources\nHit http://us-east-1.ec2.archive.ubuntu.com trusty-updates/main amd64 Packages\nHit http://us-east-1.ec2.archive.ubuntu.com trusty-updates/universe amd64 Packages\nHit http://us-east-1.ec2.archive.ubuntu.com trusty-updates/main Translation-en\nHit http://us-east-1.ec2.archive.ubuntu.com trusty-updates/universe Translation-en\nHit http://us-east-1.ec2.archive.ubuntu.com trusty/main Sources\nHit http://us-east-1.ec2.archive.ubuntu.com trusty/universe Sources\nHit http://us-east-1.ec2.archive.ubuntu.com trusty/main amd64 Packages\nHit http://us-east-1.ec2.archive.ubuntu.com trusty/universe amd64 Packages\nHit http://us-east-1.ec2.archive.ubuntu.com trusty/main Translation-en\nHit http://us-east-1.ec2.archive.ubuntu.com trusty/universe Translation-en\nIgn http://us-east-1.ec2.archive.ubuntu.com trusty/main Translation-en_US\nIgn http://us-east-1.ec2.archive.ubuntu.com trusty/universe Translation-en_US\nHit http://security.ubuntu.com trusty-security InRelease\nHit http://security.ubuntu.com trusty-security/main Sources\nGet:1 https://apt.dockerproject.org ubuntu-trusty InRelease\nIgn https://apt.dockerproject.org ubuntu-trusty InRelease\nGet:2 https://apt.dockerproject.org ubuntu-trusty Release\nHit http://security.ubuntu.com trusty-security/universe Sources\nGet:3 https://apt.dockerproject.org ubuntu-trusty/main amd64 Packages\nHit http://security.ubuntu.com trusty-security/main amd64 Packages\nGet:4 https://apt.dockerproject.org ubuntu-trusty/main Translation-en_US\nHit http://security.ubuntu.com trusty-security/universe amd64 Packages\nHit http://security.ubuntu.com trusty-security/main Translation-en\nHit http://security.ubuntu.com trusty-security/universe Translation-en\nIgn https://apt.dockerproject.org ubuntu-trusty/main Translation-en_US\nIgn https://apt.dockerproject.org ubuntu-trusty/main Translation-en\nFetched 24.0 kB in 1s (12.0 kB/s)\nReading package lists...\nReading package lists...\nBuilding dependency tree...\nReading state information...\nThe following extra packages will be installed:\n aufs-tools cgroup-lite git git-man liberror-perl\nSuggested packages:\n git-daemon-run git-daemon-sysvinit git-doc git-el git-email git-gui gitk\n gitweb git-arch git-bzr git-cvs git-mediawiki git-svn\nThe following NEW packages will be installed:\n aufs-tools cgroup-lite docker-engine git git-man liberror-perl\n0 upgraded, 6 newly installed, 0 to remove and 57 not upgraded.\nNeed to get 10.9 MB of archives.\nAfter this operation, 59.9 MB of additional disk space will be used.\nGet:1 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty/universe aufs-tools amd64 1:3.2+20130722-1.1 [92.3 kB]\nGet:2 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty/main liberror-perl all 0.17-1.1 [21.1 kB]\nGet:3 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main git-man all 1:1.9.1-1ubuntu0.1 [698 kB]\nGet:4 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main git amd64 1:1.9.1-1ubuntu0.1 [2,627 kB]\nGet:5 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty/main cgroup-lite all 1.9 [3,918 B]\nGet:6 https://apt.dockerproject.org/repo/ ubuntu-trusty/main docker-engine amd64 1.9.0-0trusty [7,482 kB]\nFetched 10.9 MB in 0s (20.4 MB/s)\nSelecting previously unselected package aufs-tools.\n(Reading database ... 60944 files and directories currently installed.)\nPreparing to unpack .../aufs-tools_1%3a3.2+20130722-1.1_amd64.deb ...\nUnpacking aufs-tools (1:3.2+20130722-1.1) ...\nSelecting previously unselected package liberror-perl.\nPreparing to unpack .../liberror-perl_0.17-1.1_all.deb ...\nUnpacking liberror-perl (0.17-1.1) ...\nSelecting previously unselected package git-man.\nPreparing to unpack .../git-man_1%3a1.9.1-1ubuntu0.1_all.deb ...\nUnpacking git-man (1:1.9.1-1ubuntu0.1) ...\nSelecting previously unselected package git.\nPreparing to unpack .../git_1%3a1.9.1-1ubuntu0.1_amd64.deb ...\nUnpacking git (1:1.9.1-1ubuntu0.1) ...\nSelecting previously unselected package cgroup-lite.\nPreparing to unpack .../cgroup-lite_1.9_all.deb ...\nUnpacking cgroup-lite (1.9) ...\nSelecting previously unselected package docker-engine.\nPreparing to unpack .../docker-engine_1.9.0-0trusty_amd64.deb ...\nUnpacking docker-engine (1.9.0-0trusty) ...\nProcessing triggers for man-db (2.6.7.1-1ubuntu1) ...\nProcessing triggers for ureadahead (0.100.0-16) ...\nSetting up aufs-tools (1:3.2+20130722-1.1) ...\nSetting up liberror-perl (0.17-1.1) ...\nSetting up git-man (1:1.9.1-1ubuntu0.1) ...\nSetting up git (1:1.9.1-1ubuntu0.1) ...\nSetting up cgroup-lite (1.9) ...\ncgroup-lite start/running\nSetting up docker-engine (1.9.0-0trusty) ...\ndocker start/running, process 29354\nProcessing triggers for libc-bin (2.19-0ubuntu6.6) ...\nProcessing triggers for ureadahead (0.100.0-16) ...\n+ sh -c docker version\nClient:\n Version: 1.9.0\n API version: 1.21\n Go version: go1.4.2\n Git commit: 76d6bc9\n Built: Tue Nov 3 17:43:42 UTC 2015\n OS/Arch: linux/amd64\n\nServer:\n Version: 1.9.0\n API version: 1.21\n Go version: go1.4.2\n Git commit: 76d6bc9\n Built: Tue Nov 3 17:43:42 UTC 2015\n OS/Arch: linux/amd64\n\nIf you would like to use Docker as a non-root user, you should now consider\nadding your user to the "docker" group with something like:\n\n sudo usermod -aG docker your-user\n\nRemember that you will have to log out and back in for this to take effect!\n\nReading package lists...\nBuilding dependency tree...\nReading state information...\nE: Unable to locate package clusterhq-flocker-node\n'...