1.设置环境变量

打开命令终端，编辑.bashrc文件中，修改HISTSIZE和HISTFILESIZE都为0

sudo nano ~/.bashrc

for setting history length see HISTSIZE and HISTFILESIZE in bash(1)

HISTSIZE=0
HISTFILESIZE=0

2.生效

source ~/.bashrc 

3.验证

cat ./bash_history

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