RubyMine uses RSync and SSHpass utilities to speed up gems downloading in case remote interpreters are configured for the application (the command looks like: sshpass -p password rsync -zarv user@host:/remote/path /local/path).
Important Note: downloading remote interpreters using Rsync is on by default in RubyMine 2016.3. To switch off this option please uncheck Registry option 'ide.remote.interpreters.use.rsync'.
SSHPass will take password which is specified in Configure Remote Ruby Interpreter, SSH Credentials. RubyMine informs if any of these utilities are not installed.
Here is some tips how to install SSHPass and Rsync.
Installing SSHPass (taken from https://gist.github.com/arunoda/7790979#file-gistfile1-md)
SSHPass is a tiny utility, which allows you to provide the ssh password without using the prompt. This will very helpful for scripting. SSHPass is not good to use in multi-user environment. If you use SSHPass on your development machine, it don't do anything evil.
`apt-get install sshpass`
Installing on OS X is tricky, since there is no official build for it. Before you get started, you need install xcode and command line tools.
Installing with Homebrew
Homebrew does not allow you to install sshpass by default. But you can use the following unofficial brew package for that.
Installing from the Source
Download the Source Code
Extract it and cd into the directory
`sudo make install`
SSHpass is not available as cygwin package. This means that you need to build and install from source. See for reference on existing alternative
`sudo apt-get -y install rsync`
Rsync is already installed
Windows: can be used on Windows systems but is only available through various ports (such as Cygwin).