-##############################################################################
-# Directory variables.
-##############################################################################
-# The yeti library directory holds useful shell scripts, public databases,
-# configuration examples, javascript code, and other stuff.
+# ulimit and umask. umask sets a permission mask for all file
+# creations. The mask shown here disallows writing by the "group" and
+# "others" categories of users. ulimit sets the user limits. the core
+# file size is set to zero.
+umask 022
+ulimit -c 0
+
+##############
+
+# Directory variables...
+