Fish shell slow to respond when command does not exist

Question

When I write a command that does not exist in the fish shell (let's say l instead of ls), fish takes some time before responding that the command does not exist.

I don't know if it looks for package to install or something else, but it is a bit annoying and I need to hit Ctrl-C to avoid waiting a few seconds.

Is there a way to disable this "feature", whatever it is?

Answer 1

As ridiculous_fish says, this is probably due to the command-not-found handler.

You can try adding this suggestion to your config.fish:

function __fish_default_command_not_found_handler --on-event fish_command_not_found
  functions --erase __fish_command_not_found_setup
  echo "'$argv' not found"
end

Answer 2

Since the other answer does not work anymore, I found another solution which consists of adding this function in config.fish:

function __fish_command_not_found_handler --on-event fish_command_not_found
    echo "fish: Unknown command '$argv'"
end

Answer 3

There is a streamlined, documented and hopefully long-term supported way to override this by declaring custom fish_command_not_found function.

~/.config/fish/functions/fish_command_not_found.fish:

function fish_command_not_found
    echo "fish: Unknown command '$argv'" >&2
end

http://fishshell.com/docs/current/cmds/fish_command_not_found.html