Hi Didier,

Didier Kryn writes:

> [... purge Network Manager...]
>
>   BTW, I'm not sure ifupdown and the interfaces file are installed by
> default nowadays. I don't remember which package one must install to
> have all this traditional infrastructure, though, if it's already
> installed, it won't be removed when dist-upgrading.

FYI, ifupdown is (still) installed by default but a simple `apt-get
install ifupdown` will put it in place if necessary.

# I have a habit of marking all installed automatic after the initial
# installation and configure APT to purge any unnecessary packages,
# occasionally even telling it to ignore Recommends:
# If you do that ifupdown may get purged.

>   If you have a wifi interface, it is more complicated. Explained below.
>
> 'apt-get install wpa-supplicant wpa-gui',

FTR, the package names are wpasupplicant and wpagui, without the -

> then write the following two
> lines into /etc/wpa_supplicant/wpa_supplicant.conf:
>
> ctrl_interface=DIR=/run/wpa_supplicant GROUP=dialout
> update_config=1
>
>   Make yourself a member of group dialout. Then search the web for a
> tutorial on wifi roaming with wpa_supplicant: it will explain you how to
> write the wifi part of the interfaces file. To finish with,
> 'dpkg-reconfigure ifplugd' to tell it to handle your wifi interface. Use
> wpa_gui everytime you want to connect your laptop to a yet-unknown wifi hub.

Thanks for the above.  Made my take a look at what wicd was doing under
the covers.  Should have done so a lot earlier ;-)

It puts snippets for your wireless interface(s) below
/var/lib/wicd/configurations/ and uses those to run wpa_supplicant like
so

  wpa_supplicant -B -i $if -c /var/lib/wicd/configurations/$mac

where $if is the interface name, typically wlan0.  The $mac is the MAC
address of the wireless access point, lower-cased, no : separators.

You can use the files in /var/lib/wicd/configurations/ to seed your
/etc/wpa_supplicant/wpa_supplicaton.conf file.

As for the group, the user that installed the system is a member of the
netdev group by default, I think.  Looks like a good default choice to
me, unless wpa_supplicant has special requirements.
Definitely more nowadaisy than dialout (or dip) :-)
BTW, group "definitions" can be found in

  file://usr/share/doc/base-password/user-and-groups.txt.gz (outdated?)
  https://wiki.debian.org/SystemGroups

I'm off now, reconfiguring my wireless setup.

Hope this helps,
--
Olaf Meeuwissen, LPIC-2            FSF Associate Member since 2004-01-27
 GnuPG key: F84A2DD9/B3C0 2F47 EA19 64F4 9F13  F43E B8A4 A88A F84A 2DD9
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