Issuing “apt-get update” command on ubuntu AWS EC2 instance upgrades PHP version from 7.1 to 7.2?

问题

Please let me know if issuing "apt-get update" command on AWS EC2 ubuntu 14.04 machine upgrades PHP version from 7.1 to 7.2

回答1:

You can confirm that with the following command:

sudo apt-get upgrade --dry-run

Based on Linux Man Page:

No action. Perform a simulation of events that would occur but do not actually change the system.

回答2:

Well, apt-get update updates the apt-get list of repositories, to update the packages installed by apt-get you should use apt-get upgrade:

# apt-get upgrade php7

or

# apt-get upgrade

来源：https://stackoverflow.com/questions/50093761/issuing-apt-get-update-command-on-ubuntu-aws-ec2-instance-upgrades-php-version