[arch-general] Set ip lan address /etc/environment

[Maykel Franco]

2018-05-31 12:01 GMT+02:00 Leonid Isaev via arch-general
<arch-general at archlinux.org>:
> On Thu, May 31, 2018 at 10:44:25AM +0100, Ralph Corderoy wrote:
>> Hi Maykel,
>>
>> > I need define variable called ip with current ip address machine...
>> > And when reboot machine, the variable ip always has ip address.
>>
>> Yes, I think we all figured that bit out.  :-)
>> But why;  what's going to be using that IP-address environment variable,
>> and when?
>
> Indeed. Is it for consumption of users whose shell you don't know? Is it for
> scripts, like cron jobs?
>
> In the former case, see what is in /etc/shells, and drop a script to
> /etc/profile.d, one for each shell. But that will be for login shells. In the
> latter case, I am afraid you need to define it each time...
>
> Finally, a bit of a puzzle, what are you going to do when the network goes
> down, i.e. should the variable be unset or updated? In other words, how certain
> are you that the IP address remains unchanged throughout the machine uptime?
>
> --
> Leonid Isaev

I need this for docker. I have docker services in which I use
variables and I want to pass the always updated ip variable. If the
network goes, it is not a problem, it will always have the same fixed
static ip. But this way I leave docker generalized for any pc.