echo n|/usr/bin/apt-get upgrade: Reading package lists... Building dependency tree... Reading state information... The following packages have been kept back: linux-generic linux-headers-generic linux-image-generic The following packages will be upgraded: libsnmp-base libsnmp15 linux-libc-dev openssh-client openssh-server tzdata 6 upgraded, 0 newly installed, 0 to remove and 3 not upgraded. Need to get 4108 kB of archives. After this operation, 3072 B of additional disk space will be used. Do you want to continue [Y/n]? Abort.