1/ To install Vagrant, you can visit official website and download Debian package. This method allows you to install latest available version of vagrant. To install vagrant from deb package just use command below:
$ sudo apt install ./vagrant_2.2.5_x86_64.deb
2/ To create and start new virtual machine which marked as primary(srt) from Vagrantfile
$ vagrant up
3/ To connect existing virtual machine which marked as primary(srt) by ssh
$ vagrant ssh
3/ To stop all virtual machine from Vagrantfile
$ vagrant halt
4/ To delete all existing virtual machine from Vagrantfile
$ vagrant destroy