ubuntu@ubuntu:~$ sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update
 Simple tool to repair frequent boot problems.

Website: https://sourceforge.net/p/boot-repair/home
 More info: https://launchpad.net/~yannubuntu/+archive/ubuntu/boot-repair
Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keyring `/tmp/tmpn317tlgs/secring.gpg' created
gpg: keyring `/tmp/tmpn317tlgs/pubring.gpg' created
gpg: requesting key 60D8DA0B from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpn317tlgs/trustdb.gpg: trustdb created
gpg: key 60D8DA0B: public key "Launchpad PPA for YannUbuntu" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
OK
Ign:1 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial InRelease
Hit:2 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial Release
Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB]
Hit:5 http://archive.ubuntu.com/ubuntu xenial InRelease
Get:6 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [95.7 kB]
Get:7 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [123 kB]
Get:8 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [358 kB]
Get:9 http://security.ubuntu.com/ubuntu xenial-security/main amd64 DEP-11 Metadata [45.5 kB]
Get:10 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [50.8 kB]
Get:11 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu xenial InRelease [17.5 kB]
Get:12 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu xenial/main amd64 Packages [1,864 B]
Get:13 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu xenial/main Translation-en [2,092 B]
Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [134 kB]
Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [189 kB]
Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [155 kB]
Fetched 1,267 kB in 21s (59.7 kB/s)

** (appstreamcli:7797): CRITICAL **: Error while moving old database out of the way.
AppStream cache update failed.
Reading package lists... Done