"VNC Snapshot is a command-line program for VNC, based on TightVNC and RealVNC. It will save a JPEG image of the VNC server's screen.
If non-interactive operation is required, the vncpasswd tool from the TightVNC package can be used to store an obfuscated password." tested on i386, amd64, sparc64 (includes LP64 fixes).
vncsnapshot.tar.gz
Description: application/tar-gz