Updating Latest Security Patches For Ubuntu | Linux Administration

Show all upgradeable packages

$ apt-get -s dist-upgrade | grep "^Inst"

Show security updates only :

$ apt-get -s dist-upgrade |grep "^Inst" |grep -i securi 

or

$ sudo unattended-upgrade --dry-run -d

or

$ /usr/lib/update-notifier/apt-check -p

Install required packages:-

$ apt-get install unattended-upgrades

1. The below command will run silently on your system and apply security updates.

$ sudo unattended-upgrades

2. Or you can use optin -d with command to show verbose logs of update process.

$ sudo unattended-upgrades -d