msu.conf. It can be used as a login shell to provide multiple users with access to a single account, each with their own 'login' and 'password', or as convenient access to a shared account. It sets the uid and gid to that of the destination account but does not revoke any existing group membership.
If given an account
will check the
file to ensure that the current user has access to the specified account.
If invoked without arguments
will su to the first destination account in
to which the current user has access.
msu will syslog all attempts, successful or not.
msu.confis of the form:
LD_PRELOADand similar variables from the environment.