[dev] Need helps for for Frrouting installation

[Konstantin Shalygin]

Why not to use sysusers.d?

> Hi,
> I've a problem with the installation of Frrouting. when I tape this command:
>   sudo adduser --system --ingroup frr --groups frrvty --home /var/run/frr/ \
>         --gecos "FRR suite" --shell /sbin/nologin frr
> the result is unknow: option groups
> when I change groups to group I've this message specify only one name in
> this mode.
>   so I don't know what i must to do. help me please.
>
> the rest work normally: git clone, ./bootstrap.sh and ./configure.
> when I want to start the deamon zebra with this command zebra -d i receive
> this message:
> privs_init: user(frr) is not part of vty group specified(frrvty)
>
> thanks you