ATT&CKcon 7.0 in-person tickets are open! Join us October 27-28, 2026 in McLean, VA. Register here for in-person tickets; hotel and location details can be found in the FAQ.
Prevent users from changing the HISTCONTROL environment variable . Also, make sure that the HISTCONTROL environment variable is set to "ignoredup" instead of "ignoreboth" or "ignorespace".