ESCET is a script driven program to analyse and compare three-dimensional protein structures. 

ESCET runs on Linux machines s; the executable is in:

/joule2/programs/escet/bin

The local documentation is in:

/joule2/programs/escet/doc/escet_ref.html

or from the author's web site at

http://shelx.uni-ac.gwdg.de/~trs/escet/escet_ref.html

also see the users manual at:
/joule/programs/escet/doc/escet_user.pdf or
/joule/programs/escet/doc/escet_user.ps