[ale] static ip network configuration
Russell L. Carter
rcarter at pinyon.org
Wed Jan 8 10:24:27 EST 2025
First, ditch the GUI. Gazing in that direction is the reason
you don't already know how to do it.
I have maintained a small herd of pet debian systems for
decades with nothing more complicated than this snippet in
/etc/network/interfaces(5):
# The motherboard primary network interface
allow-hotplug enp5s0
iface enp5s0 inet static
address 10.0.10.10/24
gateway 10.0.10.102
Multihomed works as expected and dhcp is even simpler. Nowadays
you use ip(8) for all things network related. You want to make
friends with the fabulous ArchWiki for details.
All the best,
Russell
On 1/8/25 9:46 AM, Phil Smith via Ale wrote:
> Hello All:
>
> I'm Phil Smith, an inept Ubuntu user since 6.08.
>
> I used to get advice from The Fu on Ubuntu Forums... until the forums
> collapsed.
>
> As your new "know nothing" club member, I sure would like a course for
> doing things like
>
> * setting static IP of computer on a home network using the gui
> (settings > network > wired > gear > ipv4 ), so that I can do
> reliable backups by doing rsync over ssh... and that's a pain with
> IP addresses change.
>
>
> I'll bring the ice cream if somebody wants to teach about that!
>
> Phil Smith
> (formerly "Old" on Ubuntu Forums)
>
> On Wednesday, January 8th, 2025 at 9:35 AM, Brian MacLeod via Ale
> <ale at ale.org> wrote:
>> I'll second what Russell said, and expand a little. Invariably,
>> becoming part of an HPC group means at some point (due to team demands
>> or your own personal interest) you will likely become the subject
>> matter expert (SME) for something, and thus, yes, you will be the one
>> that will be teaching something to others. The flip side of that
>> statement can also be true: because you'll develop a focus on a few
>> areas means you will have to lean on someone else for another. There
>> is too much to know. That's how I became "the storage guy" when it
>> came to clusters but knew nothing about schedulers other than basic
>> care (making sure it was up and how to get it limping) and fast
>> interconnects (InfiniBand) even though we were actively using them.
>>
>> And I'll also share one of the most maddening things I dealt with in
>> my time in HPC was the focus on speed of results, not efficiency of
>> computing (though code efficiency was occasionally a focus). There are
>> such groups, but certainly in research the focus is on speed so
>> results can be published before anyone else. That invariably means
>> there's clock time available for other projects during lulls if they
>> could be made ready, but we were always focused on faster hardware,
>> not efficient use of it.
>>
>> bnm
>>
>> On Mon, Dec 30, 2024 at 8:44 PM Russell L. Carter via Ale <ale at ale.org
>> <mailto:ale at ale.org>> wrote:
>>
>> I'm loving it! Old school: see below for the reply
>>
>> On 12/30/24 7:59 PM, Leam Hall via Ale wrote:
>> > On 12/30/24 17:50, Russell L. Carter via Ale wrote:
>> >> Yes, exactly so. This is what I meant by economically inefficient.
>> >> You can be a specialist and employed at say a National Lab. of some
>> >> sort located *not* in an expensive housing city (ie, not NASA Ames)
>> >> and enjoy the work immensely. I know I did: if you check out the
>> >> original published NAS Parallel Benchmarks you will find my
>> name right
>> >> there, and that job was the grandest adventure of my life.
>> >>
>> >> But!! I don't know anything about SLURM because my own
>> household/small
>> >> biz clusters just can't justify the overhead for *all the other
>> stuff*
>> >> that is required to make such a system viable with a low headcount
>> >> support crew of ahem uno ein un yep *1*.
>> >>
>> >> I mean it's all cool stuff and if you believe it's for you (it
>> was for
>> >> me at the time) go for it but have no illusions that anybody on say
>> >> Hacker News will understand such a thing. (That could be a good
>> reason
>> >> to do it anyway, yep I get it)
>> >>
>> >> Basically the whole cloud ecosystem which is heating up the
>> planet so
>> >> successfully is predicated on *waste*. Maybe somebody has
>> calculated
>> >> how much of the cloud is simply tests. You need tests, to be
>> sure, but
>> >> real work is always jobs of days, weeks, months. What the cloud
>> don't
>> >> care about is efficiency, in the HPC context.
>> >>
>> >> Good luck and all the best,
>> >> Russell
>> >>
>> >> Did I just top post... again? I mean &*^@(*&^#$ Firefox for getting
>> >> rid of the emacs editing ability.
>> >
>> > I'll just remove all else and respond. :D
>> >
>> > You, Brian, Vernard, and Jim, became my target audience,
>> although Jim
>> > was the only person I knew doing HPC. Vernard, Russell, it is
>> good to
>> > meet you!
>> >
>> > Much of my career has been on things most technologists don't care
>> > about: OS vulnerability scanning, supply chain security, and not
>> dumping
>> > 27,315 third-party packages on a node because the STDLIB method
>> isn't
>> > the newest or coolest thing. Having done cloud, and even
>> supported an
>> > enterprise-specific cloud backend, your opinion seems to match
>> mine. The
>> > cloud is flexible, but not overly efficient. Many cloud start-
>> ups don't
>> > seem to care what OS is underneath, they just want their app to
>> run and
>> > keep running. Which is a fine thing! If it pays the bills for
>> them and
>> > adds value to the world, then more power to them.
>> >
>> > I have a chance at an HPC job. During the interview I was honest
>> about
>> > what I didn't know, even admitting that I had to do a web search on
>> > "Slurm". I like to think I can learn, given a task list, but
>> with HPC "I
>> > don't know what I don't know". Hence the original question. I
>> chased the
>> > "AppDev" career path for a while, and while I like playing with
>> code,
>> > front end development just isn't my joy. I like Linux, I've built a
>> > career supporting it, and HPC seems like a cool path.
>> >
>>
>> Ok, all good.
>>
>> > One of the things I'm looking forward to is not being the smartest
>> > person in the "room". Which is funny, as I'm not particularly
>> smart.
>> > I've just been doing this for a long time and enjoy learning
>> more about
>> > whatever I'm doing. If I can get into an HPC shop I'll have a
>> lot to
>> > learn and smart people to learn from.
>>
>> No.
>>
>> I worked at NASA Ames "NAS", and at Sandia Livermore, and traveled to
>> about 30 research labs across the country, including later when I was
>> doing SBIRS. You are as good as your technical chops are. If you
>> are in
>> the room, or on the call, or responding constructively in a
>> distributed
>> email (or whatever the kidz do these days) you are already there. You
>> learn, yes, everybody learns. Those smart people are learning from
>> *you*, my friend.
>>
>> The problem with software shops that I have had experience with is
>> that
>> tenure is so understandably tenuous that people don't speak frankly;
>> they don't prepare you for the "life of the mind" that we had way
>> back then. I can tell you that it is very likely that as a software
>> person with (proven?) experience in the cloud that the interviewing
>> person is probably *very* interested in that perspective, as will be
>> the people you support. You can't possibly understand any of the codes
>> though and no sane person at the institution would ever suspect it.
>>
>> But! As you may have surmised from the replies those technical
>> people mainly want their codes to run efficiently. Days -> hours.
>> hours -> minutes. That sort of thing. I find that kind of puzzle
>> intoxicatingly seductive; if only it could have paid for our life.
>>
>>
>> All the best,
>> Russell
>>
>> > So I'm hoping and praying for the job; we'll see what happens.
>> >
>> > Thanks!
>> >
>> > Leam
>> >
>> >
>>
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>
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