Error issues with apt-get

ko16ftl3@WORKGROUP:~$ sudo apt-get install libnss-winbind winbindReading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
attr libhdb9-heimdal libkdc2-heimdal libpam-winbind python-dnspython
python-ntdb python-samba python-tdb samba samba-common-bin
samba-dsdb-modules samba-vfs-modules tdb-tools
Suggested packages:
bind9 bind9utils ldb-tools ntp smbldap-tools heimdal-clients
The following NEW packages will be installed:
attr libhdb9-heimdal libkdc2-heimdal libnss-winbind libpam-winbind
python-dnspython python-ntdb python-samba python-tdb samba samba-common-bin
samba-dsdb-modules samba-vfs-modules tdb-tools winbind
0 upgraded, 15 newly installed, 0 to remove and 2 not upgraded.
Need to get 1,951 kB/3,334 kB of archives.
After this operation, 25.3 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
WARNING: The following packages caot be authenticated!
libhdb9-heimdal python-samba samba-common-bin samba-dsdb-modules
libkdc2-heimdal samba winbind libnss-winbind libpam-winbind
samba-vfs-modules
Install these packages without verification? [y/N] y
Err http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libhdb9-heimdal amd64 1.6~git20131207+dfsg-1ubuntu1.1
Could not resolve 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ trusty/main python-dnspython all 1.11.1-1build1
Could not resolve 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main samba-dsdb-modules amd64 2:4.1.6+dfsg-1ubuntu2.14.04.13
Could not resolve 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ trusty/main tdb-tools amd64 1.2.12-1
Could not resolve 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libkdc2-heimdal amd64 1.6~git20131207+dfsg-1ubuntu1.1
Could not resolve 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ trusty/main attr amd64 1:2.4.47-1ubuntu1
Could not resolve 'us.archive.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ trusty-security/main samba-dsdb-modules amd64 2:4.1.6+dfsg-1ubuntu2.14.04.13
Could not resolve 'security.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ trusty-security/main samba amd64 2:4.1.6+dfsg-1ubuntu2.14.04.13
Could not resolve 'security.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ trusty-security/main winbind amd64 2:4.1.6+dfsg-1ubuntu2.14.04.13
Could not resolve 'security.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ trusty-security/universe libnss-winbind amd64 2:4.1.6+dfsg-1ubuntu2.14.04.13
Could not resolve 'security.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ trusty-security/universe libpam-winbind amd64 2:4.1.6+dfsg-1ubuntu2.14.04.13
Could not resolve 'security.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ trusty-security/main samba-vfs-modules amd64 2:4.1.6+dfsg-1ubuntu2.14.04.13
Could not resolve 'security.ubuntu.com'
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...u1.1_amd64.deb Could not resolve 'us.archive.ubuntu.com'

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...build1_all.deb Could not resolve 'us.archive.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/po...4.13_amd64.deb Could not resolve 'security.ubuntu.com'

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...12-1_amd64.deb Could not resolve 'us.archive.ubuntu.com'

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...u1.1_amd64.deb Could not resolve 'us.archive.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/po...4.13_amd64.deb Could not resolve 'security.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/po...4.13_amd64.deb Could not resolve 'security.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/po...4.13_amd64.deb Could not resolve 'security.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/po...4.13_amd64.deb Could not resolve 'security.ubuntu.com'

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...ntu1_amd64.deb Could not resolve 'us.archive.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/po...4.13_amd64.deb Could not resolve 'security.ubuntu.com'

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?