Finding differences in two files with TkDiff

tkdiff is a graphical front end to the diff program. It provides a side-by-side view of the differences between two files, along with several innovative features such as diff bookmarks and a graphical map of differences for quick navigation.

Installation OpenSuse 
Goto yast >> Software management and search for package "TkDiff", select the package and install it using yast

 

After successful installation you can goto console and use command: tkdiff to open the mail window

You can also use the tool from command like using commands ..

* tkdiff to compare two files. 
 * tkdiff -conflict to merge a file with conflict markers generated by "merge" or "cvs", The file is split into two temporary files which you can then merge as usual.
 * tkdiff to compare with the most recent version checked into CVS/SCCS/RCS (checked for in that order).
 * tkdiff -r to compare with the most recent version checked in.
 * tkdiff -r to compare with revision of .
 * tkdiff -r -r to compare revision of with the most recent version checked in.
 * tkdiff -r -r to compare revisions and of .