melio@melio-Q550LF:~$ sudo apt-get update
Ign:1 http://linux.dropbox.com/ubuntu wily InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu xenial InRelease                     
Hit:3 http://linux.dropbox.com/ubuntu wily Release                             
Hit:4 http://archive.ubuntu.com/ubuntu xenial InRelease                        
Ign:5 http://dl.google.com/linux/chrome/deb stable InRelease                   
Hit:6 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease             
Get:7 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB]    
Hit:8 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease           
Hit:10 http://dl.google.com/linux/chrome/deb stable Release                    
Hit:11 http://archive.canonical.com/ubuntu xenial InRelease                    
Ign:12 http://download.ebz.epson.net/dsc/op/stable/debian lsb3.2 InRelease     
Hit:14 http://download.ebz.epson.net/dsc/op/stable/debian lsb3.2 Release       
Fetched 94.5 kB in 0s (101 kB/s)
Reading package lists... Done
W: http://download.ebz.epson.net/dsc/op/stable/debian/dists/lsb3.2/Release.gpg: Signature by key E5220FB7014D0FBDA50DFC2BE5E86C008AA65D56 uses weak digest algorithm (SHA1)


next command --> 

melio@melio-Q550LF:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libgcc1:i386 : Depends: libc6:i386 (>= 2.2.4) but it is not installed
 lsb-core : Depends: libc6:i386 or
                     libc6-i386 but it is not installed
 zlib1g:i386 : Depends: libc6:i386 (>= 2.4) but it is not installed
E: Unmet dependencies. Try using -f.