Easier Method to Select Multiple Remote Access Systems

I have several Command Line extensions I use on my remote systems. To run these commands, I have to click the checkbox for each machine on the host screen. It would be nice to have a Shift+Click option, similar to the Windows option for selecting multiple files that are listed in contiguous order. For example, if I have machines 1-30 and wish to operate on machines 12-20, I could click machine 12, depress the Shift key, and then click machine 20 to select those nine machines.