Download this
simple command line app to show what's on the global
clipboard. Compile with the usual linux ./configure;make;sudo
make install.
It can be run from the command line or double clicked and it
will show a small window with the clipboard contents, either a
picture. file name or text. Command line usage: clipviewer
--nogui print the text on the clipboard to stdout instead of
opening a window, for use in scripts (nothing will be printed if
the clipboard holds a picture), but if it does a png image file
will be created in the current folder.
Clipboard showing text: