Re: what's the right way to resolve localhost's IPs
On 2023-03-30 13:38, Emanuel Berg wrote:
fh wrote:
In my shell script, how to get the localhost's IPs (eth0 and
eth1) correctly? I know I can run 'ifconfig' and grep etc,
but it's maybe not that graceful.
Here is what I do, now idea if it's a good idea but maybe it
can help:
#! /bin/zsh
#
# this file:
# https://dataswamp.org/~incal/conf/.zsh/ip
public-ip () {
local name=$funcstack[1]
local url='http://checkip.amazonaws.com'
local open_dns=opendns.com
echo $(curl --no-progress-meter $url) "($name)"
dig +short myip.${open_dns} @resolver1.${open_dns}
}
inet () {
local name=$funcstack[1]
echo $(hostname -I | awk '{print $1}') "($name)"
ifconfig $net | awk '/mask/{print $2}'
ip addr show $net | awk '/inet /{print $2}' | cut -d '/' -f 1
}
list-ip () {
public-ip
inet
}
alias lip=list-ip
# $ lip
# 92.34.142.23
# 92.34.142.23
# 192.168.10.224
# 192.168.10.224
# 192.168.10.224
i like the JSON output just b/c I am a programmer knowing JSON pretty
well. :)
Re: cpan oddity
On 2023-03-27 08:21, Jude DaShiell wrote: I ran cpan and did quick configuration and chose sudo to elevate privileges when necessary. Unfortunately I don't have write access on /usr/local/bin so cpan is crippled. -- Jude "There are four boxes to be used in defense of liberty: soap, ballot, jury, and amo. Please use in that order." Ed Howdershelt 1940. try cpanminus? $ sudo apt install cpanminus
Re: Question for this IP's PTR
On 2023-03-25 08:32, Greg Wooledge wrote: On Sat, Mar 25, 2023 at 08:28:03AM +0800, f...@dnsbed.com wrote: Greetings, as you see this PTR, $ dig -x 1.1.1.1 +short one.one.one.one. so 2.2.2.2 can have the PTR two.two.two.two? and 3.3.3.3 can have three.three.three.three? Any IP address can have any PTR value. You just have to petition the owner of the IP address range to set it. I didn't know .one was a valid TLD. It looks like .two is not, so if someone were to assign "two.two.two.two" as the PTR value of an IP address, that PTR would not resolve back to any IP address. (An IP address block owner might reject such a petition.) Thanks Greg. I also don't know .one is a valid TLD, looks surprising. But, one.one is owned by a domain registrar (one.com), while one.one.one's zone owner is cloudflare. $ dig one.one soa +short a.b-one-dns.net. hostmaster.one.com. 2013010101 1800 900 1209600 300 $ dig one.one.one soa +short fred.ns.cloudflare.com. dns.cloudflare.com. 2305085481 1 2400 604800 3600 maybe they co-work for this domain. regards.
Question for this IP's PTR
Greetings, as you see this PTR, $ dig -x 1.1.1.1 +short one.one.one.one. so 2.2.2.2 can have the PTR two.two.two.two? and 3.3.3.3 can have three.three.three.three? Sorry I am not good at the DNS knowledge. Regards.
Re: Small Installation Image - Installed
VNC? which would let you have the chance to install SSH server. On 2023-03-23 01:25, Macauley Clark wrote: Hello, I hope this email finds you well, I have installed Debian 11 on my HPE server and have tried to access it using SSH but found that SSH isn't an included package, from what I read. I don't particularly want to have to install Debian 11 again because the binaries had to be uploaded by the Datacenter who hosts my hardware. Anything you can suggest would be appreciated. Thanks,
Re: what's the right way to resolve localhost's IPs
On 2023-03-22 10:06, Jeremy Ardley wrote:
On 22/3/23 09:12, f...@dnsbed.com wrote:
Hello,
In my shell script, how to get the localhost's IPs (eth0 and eth1)
correctly?
I know I can run 'ifconfig' and grep etc, but it's maybe not that
graceful.
On Debian the preferred command is
root@debian12:~# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s3: mtu 1500 qdisc fq_codel
state UP group default qlen 1000
link/ether 08:00:27:18:b6:ac brd ff:ff:ff:ff:ff:ff
inet 10.31.40.166/24 brd 10.31.40.255 scope global dynamic enp0s3
valid_lft 81816sec preferred_lft 81816sec
inet6 2403:5800:c101:b700:a00:27ff:fe18:b6ac/64 scope global
dynamic mngtmpaddr
valid_lft 6667sec preferred_lft 3066sec
inet6 fe80::a00:27ff:fe18:b6ac/64 scope link
valid_lft forever preferred_lft forever
You can also output in .json format
root@debian12:~# ip -j a
[{"ifindex":1,"ifname":"lo","flags":["LOOPBACK","UP","LOWER_UP"],"mtu":65536,"qdisc":"noqueue","operstate":"UNKNOWN","group":"default","txqlen":1000,"link_type":"loopback","address":"00:00:00:00:00:00","broadcast":"00:00:00:00:00:00","addr_info":[{"family":"inet","local":"127.0.0.1","prefixlen":8,"scope":"host","label":"lo","valid_life_time":4294967295,"preferred_life_time":4294967295},{"family":"inet6","local":"::1","prefixlen":128,"scope":"host","valid_life_time":4294967295,"preferred_life_time":4294967295}]},{"ifindex":2,"ifname":"enp0s3","flags":["BROADCAST","MULTICAST","UP","LOWER_UP"],"mtu":1500,"qdisc":"fq_codel","operstate":"UP","group":"default","txqlen":1000,"link_type":"ether","address":"08:00:27:18:b6:ac","broadcast":"ff:ff:ff:ff:ff:ff","addr_info":[{"family":"inet","local":"10.31.40.166","prefixlen":24,"broadcast":"10.31.40.255","scope":"global","dynamic":true,"label":"enp0s3","valid_life_time":81787,"preferred_life_time":81787},{"family":"inet6","local":"2403:5800:c101:
b700:a00:27ff:fe18:b6ac","prefixlen":64,"scope":"global","dynamic":true,"mngtmpaddr":true,"valid_life_time":6638,"preferred_life_time":3037},{"family":"inet6","local":"fe80::a00:27ff:fe18:b6ac","prefixlen":64,"scope":"link","valid_life_time":4294967295,"preferred_life_time":4294967295}]}]
and if you write a script like this (and make it write protected and
executable)
cat ipv4_addresses.py
#!/usr/bin/env python3
import json
import sys
data = sys.stdin.read()
interfaces = json.loads(data)
for interface in interfaces:
ifname = interface['ifname']
for addr_info in interface['addr_info']:
if addr_info['family'] == 'inet':
ipv4 = addr_info['local']
print(f"{ifname}: {ipv4}")
you can do
ip -j a | ./ipv4_addresses.py
lo: 127.0.0.1
enp7s0: 10.31.40.68
or on a fancier setup
Thanks a lot. Now I prefer this way:
$ ip -j a|python3 -mjson.tool
regards.
what's the right way to resolve localhost's IPs
Hello, In my shell script, how to get the localhost's IPs (eth0 and eth1) correctly? I know I can run 'ifconfig' and grep etc, but it's maybe not that graceful. Thanks Corey
Re: debian server with two public IPs
https://lartc.org/ will help you. Exactly https://lartc.org/howto/lartc.rpdb.multiple-links.html In my same setup i was add some 'up ip rule add ...' lines into /etc/network/interfaces I finally resolved the issue with the helps of your article and this one: https://blog.scottlowe.org/2013/05/29/a-quick-introduction-to-linux-policy-routing/ Thanks a lot.
debian server with two public IPs
Hello list, I have a networking question that I can't understand for. I have the Debian 11 host with two ethernet cards. There is public IP and gateway for each ethernet card. (they are public IPs from two different net address blocks.) Say: eth0 ip: 193.36.132.10 gw: 193.36.132.1 eth1 ip: 5.255.106.10 gw: 5.255.106.1 The system's default gw is the first one (eth0). When clients from outside access eth1 ip (such as HTTP access), they can reach there. But, the returned packages from debian server to clients are always coming from eth0 gw. I expect the returned package also come from eth1 gw (since clients are accessing eth1 address). How can I setup this? Thanks for any hints. regards Corey H
Re: question about net address
On 2023-03-20 07:36, Jeremy Ardley wrote: As for the RFC? It's precise and definitive. My only concern is that some mail system implementer may 'improve' the RFC and restrict the acceptable address range to a /32 when they see a non zero final qnum in a /24 me second. 192.168.1.1/24 just makes me confused with 192.168.1.1/32 which is a real host address. for block address it should be clearly 192.168.1.0/24. Thanks Corey H
Re: question about net address
On 2023-03-19 19:01, Yassine Chaouche wrote: It only knows about saying things that sound plausible, not necessarily true. It doesn't fetch info from the internet, process it, then give it you. It rather generates text, using statisics. Don't get mislead by it. It often gives wrong answers. For this kind of definition with clear rules (SPF), I think chatGPT is more precise than person. regards FengHe
Fehler in der Debian-Installation (debian-installer) Raid, lilo und externen Controller (Sarge Netinstall aktuelle Version)
Hallo, ich habe festgestellt, dass bei Sarge-Installation folgende Installationsteile Fehlerhaft sind: Fehler 1 Boot-Manager Installation: --- Bei Auswahl von Raid/Root Platten zur Installation oder bei der Standardinstallation wir ein Fehler am Punkt Installation Grub erzeugt, der nicht ganz Interpretierbar ist: - Keine weiteren Hinweis auf Konsole 3 - keine abgeschlossene Installation des Boot-Managers Das Selbe Phänomen tritt auf, falls das Motherboard einen zusätzlichen DMA-Controller oder ein zusätzlicher Raid/DMA- Controller im System vorhanden ist, und somit /dev/hda nicht die erste Festplatte ist. Zudem Frage ich mich, ob Grub überhaupt Raid-Systeme unterstützt? Lilo kann mit Raid1 und Raid 0 umgehen, sollte man nicht eher Lilo Als Standard-Bootmanager verwenden?? Fehler 2 Lilo wird nicht bei Auswahl Installieren Boot Lilo installiert - Dieser Fehler ist relativ unlogisch. Nachdem der Grub versagt hat, versuch man ja den lilo als Bootmanager zu installieren. Wieder erscheint die gleiche (siehe Fehler 1). Dann habe ich versucht im Target mit chroot das installierte System zu testen - siehe da, keine Lilo installiert. Auch auch der CD (Netinstall, aktuellste Version) ist kein Lilo zu finden! Absicht?? Mit freundlichen Grüßen Robert Gladewitz Fachhochschule Heidelberg DV-Technik und DV-Administration Internet: www.fh-heidelberg.de E-Mail: [EMAIL PROTECTED] Priv: E-Mail: [EMAIL PROTECTED] Internet: www.gladewitz.de
Fehler in der Debian-Installation (debian-installer) Raid, lilo und externen Controller (Sarge Netinstall aktuelle Version)
Hallo, ich habe festgestellt, dass bei Sarge-Installation folgende Installationsteile Fehlerhaft sind: Fehler 1 Boot-Manager Installation: --- Bei Auswahl von Raid/Root Platten zur Installation oder bei der Standardinstallation wir ein Fehler am Punkt Installation Grub erzeugt, der nicht ganz Interpretierbar ist: - Keine weiteren Hinweis auf Konsole 3 - keine abgeschlossene Installation des Boot-Managers Das Selbe Phänomen tritt auf, falls das Motherboard einen zusätzlichen DMA-Controller oder ein zusätzlicher Raid/DMA- Controller im System vorhanden ist, und somit /dev/hda nicht die erste Festplatte ist. Zudem Frage ich mich, ob Grub überhaupt Raid-Systeme unterstützt? Lilo kann mit Raid1 und Raid 0 umgehen, sollte man nicht eher Lilo Als Standard-Bootmanager verwenden?? Fehler 2 Lilo wird nicht bei Auswahl Installieren Boot Lilo installiert - Dieser Fehler ist relativ unlogisch. Nachdem der Grub versagt hat, versuch man ja den lilo als Bootmanager zu installieren. Wieder erscheint die gleiche (siehe Fehler 1). Dann habe ich versucht im Target mit chroot das installierte System zu testen - siehe da, keine Lilo installiert. Auch auch der CD (Netinstall, aktuellste Version) ist kein Lilo zu finden! Absicht?? Mit freundlichen Grüßen Robert Gladewitz Fachhochschule Heidelberg DV-Technik und DV-Administration Internet: www.fh-heidelberg.de E-Mail: [EMAIL PROTECTED] Priv: E-Mail: [EMAIL PROTECTED] Internet: www.gladewitz.de
