Important: Redhat 9 users should define a good LD_ASSUME_KERNEL variable to use old linux threads implementation:
setenv LD_ASSUME_KERNEL 2.4.18-4
To launch Salome with the supervision to be available, you can use a line like:
$KERNEL_ROOT_DIR/bin/salome/runSalome --modules=TECHOBJ,SUPERV --logger=1
A window containing TECHOBJ and SUPERV should appears. Please, refer to the supervision documentation to see how it works !