day_15.md

Day 15

Notes

• apt-cache dump can be used to see what packages are available officially and their dependencies. Example -

apt-cache dump | grep -i "figlet"

gives -

Package: python-pyfiglet
Package: figlet
  Depends: figlet (null)
Package: python3-pyfiglet
  Depends: python-pyfiglet 0.7.1
  Depends: figlet (null)
  Depends: python-pyfiglet 0.7.1
  Depends: figlet 2.2.1-4
  Depends: figlet (null)
  Depends: figlet (null)
  Depends: php-text-figlet (null)
Package: php-text-figlet
  Depends: python3-pyfiglet (null)
  Depends: figlet (null)

• apt-cache dump | grep "Package:" | wc -l to see the number of packages that can be already installed from the repositories. (gives 89628)
• You can immediately execute the previous command(s) by !beginning_few_letters_of_command. Example, if you have entered the following three commands -

apt-cache dump | grep "Package:" | wc -l
find . -name "*conf*"
sudo apt update

• Now if you want to run command 1, you can simple do !apt, similarly for command 2 !fi and command 3 !sudo.
• It seems multiverse and universe are already enabled in the /etc/apt/sources.list.

Readings

• How to use yum - Introduction
• Package management with APT
• What do you mean by Free Software?