Linux cancels root command history to increase security

In linux, the system automatically records the commands that the user has input, while the commands issued by the root user often have sensitive information. To ensure security, generally, you should not remember or record the root command history. In order to set the system to not record commands executed by individuals, set HISTSIZE0 or ln-sdevnull in etcprofile.

In linux, the system automatically recordsCommandThe commands issued by the root user are often sensitive information. To ensure security, the root command history should not be remembered or recorded. In order to set the system to not record commands executed by individualsFileSettings:
HISTSIZE = 0

Or:
Ln-S/dev/null ~ /. Bash_history

In this way, you can.