Human friendly bash auto-completion with sudo

Question

My system is Manjaro Linux based on Arch Linux, I use bash and bash-completion.

It works perfectly when I type something as regular user (no sudo)

$ rfkill <TAB><TAB>
block    event    help     list     unblock 

but when I type it with sudo

$ sudo rfkill <TAB><TAB>
Display all 3811 possibilities? (y or n)

Obviously, it tries to complete sudo command but I want it to complete rfkill.

I know I can change this behavior by editing /usr/share/bash-completion/completions/sudo file, but I have no idea how to say if second word is not a flag for sudo then use completion for next word.

Do you have?

UPD: I'm testing Ubuntu 16.04 in virtual machine and I see it works as expected. I'll check the difference between ubuntu's /usr/share/bash-completion/completions/sudo file and mine, if any.

UPD2: There is some mirror (meaningless) difference between these files, anyway that didn't help. I have more ideas to test...

Answer 1

I had exactly the same problem (running Manjaro) and found a solution in the Manjaro Forum (Source):

1. Make sure bash-completion is actually installed by checking whether /usr/share/bash-completion/bash_completion exists. If not install it with pacman -S bash-completion
2. In your ~/.bashrc file make sure that complete -cf sudo is commented out. Otherwise, this will make sudo only auto-complete filenames and commands but not use bash-completion.

I hope this helps you solving the problem

Answer 2

use double tab:

sudo rfkill <TAB><TAB>

UPD

if there is not that line, add this to your .bashrc

complete -cf sudo