1sudo add-apt-repository ppa:webupd8team/java 2sudo apt-get update 3sudo apt-get install oracle-java8-installer More details in https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-get-on-ubuntu-16-04

1dpkg --get-selections

PPA or Personal Package Archive are unofficial and may therefore harm your system. It is always recommended to use official sources. Nevertheless, if you know what you're doing, proceed. It is in: 1/etc/apt/sources.list.d/ More info in https://askubuntu.com/questions/57326/where-is-the-ppa-sources-config-file

1apt hold <package> See https://www.tecmint.com/disable-lock-blacklist-package-updates-ubuntu-debian-apt/

https://help.ubuntu.com/community/AutomaticSecurityUpdates http://packages.ubuntu.com/search?keywords=unattended-upgrades

See https://www.digitalocean.com/community/questions/how-to-upgrade-from-php-v-5-5-9-to-v-5-6

1sudo apt-get install -y python-software-properties 2sudo add-apt-repository -y ppa:ondrej/php 3sudo apt-get update -y 4sudo apt-get install -y $(apt-cache pkgnames | grep php7.1|tr "\n" " ") See https://www.vultr.com/docs/how-to-install-and-configure-php-70-or-php-71-on-ubuntu-16-04

In our example, we have Debian Squeeze (6.0) and it's been unsupported since Feb 2016. We can no longer install nor update the packages until you point it to another source...the archives. So, in /etc/apt/sources.list, add you will see: 1deb http://ftp.us.debian.org/debian/ squeeze main 2deb-src …

1sudo apt-get update 2sudo apt-get install linux-virtual See details in https://www.digitalocean.com/community/tutorials/how-to-update-a-digitalocean-server-s-kernel#upgrading-only-the-latest-kernel

1do-release-upgrade See https://help.ubuntu.com/lts/serverguide/installing-upgrading.html