+`LTTNG_HOME`::
+ Overrides the `$HOME` environment variable. Useful when the user
+ running the instrumented application has a non-writable home
+ directory.
++
+Unix sockets used for the communication between `liblttng-ust` and the
+LTTng session and consumer daemons (part of the LTTng-tools project)
+are located in a specific directory under `$LTTNG_HOME` (or `$HOME` if
+`$LTTNG_HOME` is not set).
+