To determine whether your Vagrant is out of date or not, issue:

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$ vagrant version
Installed Version: 1.7.4
Latest Version: 1.7.4
You're running an up-to-date version of Vagrant!

If yours is out of date, you can download it from its download page. However, being a lazy programmer, that’s still too many clicks. I want to figure out a way to update or install Vagrant from the command line without prompt.

And here you go!

Vagrant binaries are distributed by Bintray, its format is:

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https://dl.bintray.com/mitchellh/vagrant/vagrant_{version}.msi

For example:

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https://dl.bintray.com/mitchellh/vagrant/vagrant_1.7.4.msi

After you issue vagrant version, you know the correct version to upgrade, then download it:

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$ curl -sSL https://dl.bintray.com/mitchellh/vagrant/vagrant_1.7.4.msi > vagrant.msi

Install it by msiexec:

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$ msiexec /i C:\Users\Chao\Downloads\vagrant.msi /passive /norestart

Make sure to use the full path instead of relative .\vagrant.msi, and Vagrant should be installed in the default location C:\HashiCorp\Vagrant. To find out all possible options, Just type msiexec command only.

Saving a few clicks!

Using Vagrant file provision in a Windows host, the line endings are not converted from CRLF to LF (Linux systems). So, code cannot be executed properly in the guest Linux system. And also this is a frequently occurred message for working with Windows:

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warning: LF will be replaced by CRLF in README.md.
The file will have its original line endings in your working directory.

One solution is to use UNIX line ending (LF) even in Windows, hence no conversion is needed. This is done by setting:

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$ git config --global core.autocrlf input

Which means when committing the code to a remote repository, the line ending will be convert from CRLF to LF if any, but when checking out from the remote directory, no conversion from LF to CRLF is performed.