Is there a tool that runs on linux (preferably GUI) that can compare a text file to any number of other text files? I currently use meld and it works great for up to 3 files. I am looking for something that can compare more files.
Diffuse is a graphical tool for merging and comparing text files. Diffuse is able to compare an arbitrary number of files side-by-side and gives users the ability to manually adjust line matching and directly edit files. Diffuse can also retrieve revisions of files from Bazaar, CVS, Darcs, Git, Mercurial, Monotone, RCS, Subversion, and SVK repositories for comparison and merging.
(This code is a fork based on the original project on SourceForge: https://sourceforge.net/projects/diffuse/)
I've checked and you can add up to 16 panes for comparing text files. The original project on SourceForge was not update since 2014-07-18.