Packages Managers in linux

 Packages in Linux

There are various pakage managers in linux.

Here we are using kali linux, a debian distribution

(.deb)

Ways to install packages in linux:

• dpkg 
• It is a debian package manager.
• For using dpkg ,we need the .deb file of the particular pakage.
• Command : "sudo dpkg -i <package_name.deb>"
• This is not a efficient way of installing package.
• It is a low level package installing tool.
• apt
• It is a advance package management tool.
• It is very easy to use and handle error.
• Command : "sudo apt install <package_name>".
• There are various packages available in the apt package manager.
• On using certain keyword ,packages can be installed to the machine.
• aptitude
• It is also a advanced package management tool.
• It use gui to install and manage packages.

Using apt to install and manage packages:

• Start VirtualBox and Boot Kali linux.
• Open the terminal in Kali linux.
• Before installing any package a primary step is to update the machine.Since the package manager get update randomly.On updating we can get the latest version of the package.
  
• We can see the available packages with the following command.

  

  
  
• Lets install a fun package cmatrix

  

  
  
• To run cmatrix:

    

  
  
• To stop a execution : Ctrl+Z

  
  
• To list the installed appication .

                                                                               Without grep all the packages in machine will be displayed.grep is similar to word finder.

Using apt to remove packages:

• Command : "sudo apt remove/purge <package_name>"
• remove : Only remove the application and the user details will remain.
• purge : Completely remove all data about the application/package.
• Example : Removing cmatrix