Le 23/10/2018 à 19:27, Steve Litt a écrit :
> Vim or Emacs. You can only have one.
>
> Perl, Python, Ruby or Lua. You can only have one.
>
> Mutt or Thunderbird. You can only have one.
>
> Sysvinit, runit, s6, perp or Epoch. You can only have one.

    kernel, can you have two?

    fstab, can you have two?

    udev, eudev, mdev and vdev, can you have two?

    syslog server, can you have two?

    Well, for ordinary applications, you can have as many as you like,
while for some critical services, you can only have one.

    For some, there is a possiblity to have severall, but having
severall may have a high cost, either in complexity or in difficulty to
achieve and manage, or both.

        Didier