6 Jul
2016
6 Jul
'16
12:53 p.m.
On Wednesday 06 July 2016 14:33:25 deloptes wrote:
Gene Heskett wrote:
In what files, plz? I found the man pages quite opaque in that regard.
On Monday 04 July 2016 03:46:38 deloptes wrote:
You have the strangest problems. Amazingly you solve them the "gene"
way.
Gene Heskett wrote:
The last time, several years ago, that I tried using dhcp on my
lappy, which is itself an antique, I had 3 problems.
1. NM insisted on using the bcm-4318 radio in the lappy even if it
was powered down by the switch. It totally ignored a radio in a usb
dongle that actually worked where the bcm-4318 never worked for more
than 1 minute, even when useing the drivers from xp that came
installed to run it. Rebooting to xp disclosed that this pos radio
was junk from the gitgo. But, anything that looks or acts like network
manager has been
removed from my system. So any comments I might make about NM
should be taken as the best swag* I can make based on 18 years of
running linux.
NM is useful on notebooks that change locations, interfaces etc. If
one uses a home network with many computers I would advise setting
up proper dhcp and perhaps name server. You don't have to take care
of each machines own files. But this is usually an individual
preference.
regards 2. Getting it setup via dhcp with a usb radio
dongle, so I could sit
down while out in the shop, and write gcode for one of the 2
machines out there worked flawlessly over an ssh -Y machinename
connection, until I wanted to ssh -Y lappy, which is its own name
from the house machine. So the dns lookup which NM should have set
up, wasn't there, forcing me to string a 25' hunk of cat5 plugged
into its ethernet port. Adding its ip address and name to all the
hosts files, and fixing all the network related files to be
immutable after edited correctly, and then its just one of the
family.
I never had a problem using dhcp. At home we have a server (many
disks) that has dhcpd and dns server running. This serves the local
network. It stays behind a firewall. The router has wireless access
point and is infront of the firewall. The router has also a dhcpd and
nameserver, but when connecting via wireless I use the vpn (running on
the firewall).
Strangely, when NM found it couldn't rewrite
those files, it made no
complaint in any log. And it didn't spin its wheels, burning up the
cpu either.
3. I've left it that way in all subsequent installs. Now I remove
NM and other than making /etc/resolv.conf a real file, its a 10
minute job after a fresh install to have a working network
regardless of which socket I plug its cat5 cable into. With 2, 8
port switches available, soon to be 3 as I'll need another in the
garage as I bring a bigger Sheldon 11x36 lathe to life with
LinuxCNC. So the end of the cat5 I strung thru the nether regions
of the house to get to the garage, will eventually have an 8 port
switch on the end of it. That cable was 4 days getting run, a right
PITA.
I had the issue with the resolv.conf being not a symlink when
experimenting, but I prefer the standard solution, which seems to be
working fine.
I takes 1minute to set a new machine up. Just add mac/hostname to dhcp
and hostname/ip to bind and restart both - done. Many physical and
virtual machines reside there. I even use the conf files to remember
what is setup where :)
I also prefer cat5 because of nfs, but my wife uses heavily the
wireless from here (smart) phone. I think she finds typing with one
finger on the touch screen sexy :)
I replaced all use of nfs with its finickety file system setups about 6
months back with a key file acl in sshfs, so no login. It Just
Works(TM). Dr Klepp on this list can probably advise you how.
Putting all three of the current cnc machines to full read/write
accessability, once the keys have been traded, is as simple as:
=========================
#!/bin/bash
sshfs gene@shop:/ /sshnet/shop
sshfs gene@lathe:/ /sshnet/lathe
sshfs gene@GO704:/ /sshnet/GO704
=========================
And they are magically available to me as user 1000.
The great thing of FOSS software is you can fix and
customize it the
way you like it. Thumbs up, Gene!
Absolutely, and too few, particularly those coming in from a windows
environment, can understand that. My mind was never poisoned by that,
thank $DIETY.
My trail thru multiuser/multitasking operating systems starts in about
1985 when I discovered os9 for the trs-80 Color computers, very much
like unix but could run on a 16 bit cpu.
From there to amigados because we used half a dozen of them for graphics
generators at the tv station, Jim Hines and I wrote some PD and some
commercial SW in that language, the PD was a EzCron that didn't burn cpu
in a wait loop, and the commercial program was EzHome to run a housefull
of X10 stuff. I still do that but with heyu.
And finally in '98 to a RedHat 5 system I built at work and took home to
replace the aging A2k I had been using for a decade. And we still, to
this day, do not have a programming language with the power of William
(Bill) Hawes "ARexx" which was a huge, went right to the hardware
superset of Regina for Linux. You could write assembly language
powerfull SW in plain English. Bill should have collected at least half
of what Commie sold it for, on a per copy basis. But he never got a
damned dime. Commie stiffed a lot of people when the two top guys went
to Bermuda, along with any money that was in the bank account at the
time.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>