What is pmvi pmless pmumacs pmmg?
UPM contains some optional client programs pmvi, pmless, pmumacs and pmmg. The pmvi, pmumacs and pmmg programs are UPM's versions of the vi and emacs text editors. pmless is the UPM version of the less utility, which is similar to the more command.
All of the programs have been modified so that they can only edit the file specified on the command line. All internal commands for reading and writing of other files have been removed. All internal commands for starting subprocesses (including subshells) have also been removed. Typically you might want to use these utilities when you need to grant ordinary users the ability to safely manipulate certain files as root under UPM.
If required these utilities should be installed on UPM clients within a directory defined in a users PATH.