Dwarf Therapist is an almost essential mod to tune dwarvish behaviour (makes life a lot easier). For it to work on current kernels you will need to disable a kernel security feature, since dwarf therapist directly accesses and modifies the memory of a running dwarf fortress instance. This setting is called
kernel.yama.ptrace_scope and defaults to
1. You need to set it to
0 for dwarf therapist to work:
# sysctl -w kernel.yama.ptrace_scope=0
For more information see sysctl.
Note: You should not set this to
/etc/sysctl.d/ by default since it is a valid security feature! It is best to set it manually whenever you play dwarf fortress and reset it back to
1 when you are done playing.