$ which gnome-panel
/usr/bin/gnome-panel
$ which gnome-panel.real
/usr/bin/gnome-panel.real
$ diff /usr/bin/gnome-panel /usr/bin/gnome-panel.real
Binary files /usr/bin/gnome-panel and /usr/bin/gnome-panel.real differ
$ file /usr/bin/gnome-panel /usr/bin/gnome-panel.real
/usr/bin/gnome-panel: POSIX shell script, ASCII text executable
/usr/bin/gnome-panel.real: ELF 64-bit LSB executable, x86-64, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24,
BuildID[sha1]=0x14c3504e1440b1239cd59e158a5810b4bc491fbb, stripped
$ cat /usr/bin/gnome-panel
#!/bin/sh
/usr/bin/gnome-panel.real --replace
:-)
