Updating packages in ubuntu
It also offers apt-get and apt-cache command-line tools for managing packages more interactively on Debian and its derivatives such as Ubuntu and Linux Mint systems.Essentially, apt-get or apt do not understand archives associated with a package name, from a source specified in the /etc/apt/file.After reloading my work laptop with Ubuntu 16.04 LTS (I prefer to do a reload versus an upgrade, for each LTS version) I was very excited to install PHP 7, and installed using the standard Ubuntu repositories using typical commands: However, after doing the installs I discovered PHP scripts would not render in a browser.After a small amount of digging I realized that doing the base installs did not include one important piece.This is useful to those new users who have migrated from Windows to Ubuntu or Linux Mint.
If you want to get rid of a program, you can uninstall its associated packages. This will come in handy if a program isn’t working properly.
This will download and install all of the packages listed.
If there are dependencies – other prerequisite packages – they will also be installed.
Linux manages software through packages, individual units of software that contain user interfaces, modules, and libraries.
Most applications link several co-dependent packages together, and still others allow you to choose which packages to install and which to leave out at your own discretion.