将.bashrc 中的HISTSIZEand设置HISTFILESIZE为空字符串：

HISTSIZE= 
HISTFILESIZE=

在bash 4.3
及更高版本中，您还可以使用HISTSIZE=-1 HISTFILESIZE=-1：

n.  Setting HISTSIZE to a value less than zero causes the history list to be
    unlimited (setting it 0 zero disables the history list).

o.  Setting HISTFILESIZE to a value less than zero causes the history file size
    to be unlimited (setting it to 0 causes the history file to be truncated
    to zero size).

bash --version检查您的 bash 版本。