How to install only security updates in Ubuntu – Command line

• sudo apt-get install unattended-upgrades
• sudo unattended-upgrades -v

or 

• sudo apt-get -s dist-upgrade | grep "^Inst" | grep -i security
• sudo apt-get -s dist-upgrade | grep "^Inst" | grep -i security | awk -F " " {'print $2'} | sudo xargs apt-get --yes install

All available Options:
-h, –help show this help message and exit
-d, –debug print debug messages
–apt-debug make apt/libapt print verbose debug messages
-v, –verbose print info messages
–dry-run Simulation, download but do not install
–download-only Only download, do not even try to install.
–minimal-upgrade-steps
Upgrade in minimal steps (and allow interrupting with
SIGTERM