Converting xlsx Excel format files to CSV on Linux - LinuxConfig.org

In this short config I'll show how to convert xlsx Excel format files to CSV using Gnumeric spreadsheet program. Gnumeric is for this job the best tool to use as it will save you plenty of time.
This is a companion discussion topic for the original entry at https://linuxconfig.org/converting-xlsx-excel-format-files-to-csv-on-linux