Instead of re-creating your tar archives when you need to add files, why not simply append those files? Jack Wallen shows you how from the command line and a GUI file manager on Linux.

Linux has many ways to install applications, including Personal Package Archives in Debian and Ubuntu-based distributions. Here's how they work.

I used Lynx to locate and download the correct PowerCLI file for my Linux distribution. I then created the directory into which to install the PowerCLI file, moved the file to that directory, ...