BASH Shell setup filename tab-completion case insensitive

To set up filename tab-completion in the Bash shell so that it is case-insensitive, you can use the bind command to bind the TAB key to a function that performs case-insensitive tab-completion.

Here is an example of a function that performs case-insensitive tab-completion:

function case_insensitive_tab_completion {
  local cur=${COMP_WORDS[COMP_CWORD]}
  COMPREPLY=( $(compgen -f -X '!*' -- "$cur" | tr '[:upper:]' '[:lower:]') )
}

To bind this function to the TAB key, you can use the following command:

bind 'TAB: case_insensitive_tab_completion'

This will cause the Bash shell to use the case_insensitive_tab_completion function whenever the TAB key is pressed to perform tab-completion. The function will convert the current completion word to lowercase and use it to generate a list of case-insensitive completions.

To make this change permanent, you can add the bind command to your ~/.bashrc file. This will cause the function to be bound to the TAB key every time you start a new Bash shell.