How To Disable the Bash Terminal Bell

The Readline library has a bell-style
variable that controls what happens when Readline wants to ring the terminal bell. If set to ‘none’, Readline never rings the bell. If set to ‘visible’, Readline uses a visible bell if one is available. If set to ‘audible’ (the default), Readline attempts to ring the terminal’s bell.
Edit your ~/.inputrc
file and add following line:
set bell-style none
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