lion's questions

Just installed Ubuntu and one of my network card ports does not work and has no ping to it's IP - eno2.

Netplan as configured during install:

    # This is the network config written by 'subiquity'
network:
  ethernets:
    eno1:
      addresses:
      - 11.22.33.210/24
      - 1a2a:3a4a:5a6a:16::601/64
      gateway4: 11.22.33.1
      gateway6: 1a2a:3a4a:5a6a:16::1
      nameservers:
        addresses:
        - 1.1.1.1
        - 1.0.0.1
        - 8.8.8.8
        - 8.8.4.4
        - 2606:4700:4700::1111
        - 2606:4700:4700::1001
        - 2001:4860:4860::8888
        - 2001:4860:4860::8844
      accept-ra: no
    eno2:
      addresses:
      - 22.33.44.210/24
      - 1a2a:3a4a:5a6a:17::602/64
      gateway4: 22.33.44.1
      gateway6: 1a2a:3a4a:5a6a:17::1
      nameservers:
        addresses:
        - 1.1.1.1
        - 1.0.0.1
        - 8.8.8.8
        - 8.8.4.4
        - 2606:4700:4700::1111
        - 2606:4700:4700::1001
        - 2001:4860:4860::8888
        - 2001:4860:4860::8844
      accept-ra: no
    eno3:
  addresses:
  - 33.44.55.210/24
  - 1a2a:3a4a:5a6a:18::603/64
  gateway4: 33.44.55.1
  gateway6: 1a2a:3a4a:5a6a:18::1
  nameservers:
    addresses:
    - 1.1.1.1
    - 1.0.0.1
    - 8.8.8.8
    - 8.8.4.4
    - 2606:4700:4700::1111
    - 2606:4700:4700::1001
    - 2001:4860:4860::8888
    - 2001:4860:4860::8844
    - 2606:4700:4700::1111
    - 2606:4700:4700::1001
    - 2001:4860:4860::8888
    - 2001:4860:4860::8844
  accept-ra: no
eno4:
  addresses:
  - 44.55.66.210/24
  - 1a2a:3a4a:5a6a:19::604/64
  gateway4: 44.55.66.1
  gateway6: 1a2a:3a4a:5a6a:19::1
  nameservers:
    addresses:
    - 1.1.1.1
    - 1.0.0.1
    - 8.8.8.8
    - 8.8.4.4
    - 2606:4700:4700::1111
    - 2606:4700:4700::1001
    - 2001:4860:4860::8888
    - 2001:4860:4860::8844
  accept-ra: no
  version: 2

Ran this

echo 101 eno1-route >>/etc/iproute2/rt_tables
echo 102 eno2-route >>/etc/iproute2/rt_tables
echo 103 eno3-route >>/etc/iproute2/rt_tables
echo 104 eno4-route >>/etc/iproute2/rt_tables

rc.local

#!/bin/bash 

# Increasing The Transmit Queue Length
/sbin/ifconfig eno1 txqueuelen 10000
/sbin/ifconfig eno2 txqueuelen 10000
/sbin/ifconfig eno3 txqueuelen 10000
/sbin/ifconfig eno4 txqueuelen 10000
/sbin/ifconfig lo txqueuelen 10000
#routes
ip route add default via 11.22.33.1 dev eno1 table eno1-route
ip rule add from 11.22.33.210 lookup eno1-route
ip route add default via 22.33.44.1 dev eno2 table eno2-route
ip rule add from 22.33.44.210 lookup eno2-route
ip route add default via 33.44.55.1 dev eno3 table eno3-route
ip rule add from 33.44.55.210 lookup eno3-route
ip route add default via 44.55.66.1 dev eno4 table eno4-route
ip rule add from 44.55.66.77 lookup eno4-route

Getting this error when applying netplan.

** (generate:5742): WARNING **: 05:13:22.079: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in eno2 but also in eno4

All IPs both IPv4 and IPv6 seem pinglable after reboot. What is going on? I already have different routing tables. Conflicting default route declarations!?

ip route list returns

default via 22.33.44.1 dev eno2 proto static 
default via 33.44.55.1 dev eno3 proto static 
default via 11.22.33.1 dev eno1 proto static 
default via 44.55.66.1 dev eno4 proto static 
44.55.66.0/24 dev eno4 proto kernel scope link src 44.55.66.210 
11.22.33.0/24 dev eno1 proto kernel scope link src 11.22.33.210 
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 
22.33.44.0/24 dev eno2 proto kernel scope link src 22.33.44.210 
33.44.55.0/24 dev eno3 proto kernel scope link src 33.44.55.210 

Have a server with 4 subnets - 1 usable IP, each configured on separate network port on the network card. Running 4 docker containers, but they are randomly accessible upon reboot. How to add a static route for each?

container1 - network card port1 - Subnet/IP1
container2 - network card port2 - Subnet/IP2
container3 - network card port3 - Subnet/IP3
container4 - network card port4 - Subnet/IP4

the route of docker for now is: 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1

I need each docker container to use a separate port, network (IP).

I have a server with 2 network cards of 4 ports, but only one of them is used. Each port is connected to a L2 switch and configured for a different VLAN with 1 usable IP from a different /24 subnet - each with different default gateway. Only 1 of the ports works properly - eno4. The rest could be pinged, but with losses every other time. I get this error when applying netplan:

Problem encountered while validating default route consistency.Please set up multiple routing tables and use routing-policy instead. Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in eno2 but also in eno4

netplan itself:

network:
  ethernets:
    eno1:
      addresses: ['aa.bb.cc.dd/24', 'a:b:c:x:e:f:g:1/64']
      gateway4: aa.bb.cc.1
      gateway6: a:b:c:x:e:f:g:0001
      nameservers:
          addresses: [1.1.1.1, 1.0.0.1, 8.8.8.8, 8.8.4.4, 2606:4700:4700::1111, 2606:4700:4700::1001, 2001:4860:4860::8888, 2001:4860:4860::8844]
      accept-ra: no
    eno2:
      addresses: ['ee.ff.gg.hh/24', 'a:b:c:y:e:f:g:2/64']
      gateway4: ee.ff.gg.1
      gateway6: a:b:c:y:e:f:g:0001
      nameservers:
          addresses: [1.1.1.1, 1.0.0.1, 8.8.8.8, 8.8.4.4, 2606:4700:4700::1111, 2606:4700:4700::1001, 2001:4860:4860::8888, 2001:4860:4860::8844]
      accept-ra: no
    eno3:
      addresses: ['ii.jj.kk.ll/24', 'a:b:c:z:e:f:g:3/64']
      gateway4: ii.jj.kk.1
      gateway6: a:b:c:z:e:f:g:0001
      nameservers:
          addresses: [1.1.1.1, 1.0.0.1, 8.8.8.8, 8.8.4.4, 2606:4700:4700::1111, 2606:4700:4700::1001, 2001:4860:4860::8888, 2001:4860:4860::8844]
      accept-ra: no
    eno4:
      addresses: ['mm.nn.oo.pp/24', 'a:b:c:v:e:f:g:4/64']
      gateway4: mm.nn.oo.1
      gateway6: a:b:c:v:e:f:g:0001
      nameservers:
          addresses: [1.1.1.1, 1.0.0.1, 8.8.8.8, 8.8.4.4, 2606:4700:4700::1111, 2606:4700:4700::1001, 2001:4860:4860::8888, 2001:4860:4860::8844]
      accept-ra: no
#    ens1f0:
#      dhcp4: true
#    ens1f1:
#      dhcp4: true
#    ens1f2:
#      dhcp4: true
#    ens1f3:
#      dhcp4: true
  version: 2

What am I missing here and how to properly route?

I run an instance of Ubuntu Server 20.04.3. What is the best method to check which operation the disks in RAID do more in relation to each other? Read and Write? Like Writes - 80%, Reads - 20%.

Trying to mount USB NVMe M.2 box to laptop with Ubuntu Studio 20.04 to no avail.

Without the device connected:

$ ls /dev/ | grep sd
sda
sda1
sda2
sda5
sda6

Wit the device connected:

$ ls /dev/ | grep sd
sda
sda1
sda2
sda5
sda6
sdb

So I try...

$ mkdir /media/usb
$ mount /dev/sdb1 /media/usb
mount: /media/usb: special device /dev/sdb1 does not exist.

$ mount /dev/sdb /media/usb
mount: /media/usb: can't read superblock on /dev/sdb.

Ironically the NVMe box only came with USB male to male cable and I took the USB cable from my mobile phone. USB port seems 3.0, but the cable runs on 2.1 speed. Interesting parts from lshw...

*-usb
     description: USB controller
     product: 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller
     vendor: Intel Corporation
     physical id: 14
     bus info: pci@0000:00:14.0
     version: 31
     width: 64 bits
     clock: 33MHz
     capabilities: pm msi xhci bus_master cap_list
     configuration: driver=xhci_hcd latency=0
     resources: irq:128 memory:94400000-9440ffff
   *-usbhost:0
        product: xHCI Host Controller
        vendor: Linux 5.11.0-25-lowlatency xhci-hcd
        physical id: 0
        bus info: usb@1
        logical name: usb1
        version: 5.11
        capabilities: usb-2.00
        configuration: driver=hub slots=16 speed=480Mbit/s
      *-usb:0
           description: Mass storage device
           product: AXAGON USB M.2 NVMe box
           vendor: JMicron
           physical id: 1
           bus info: usb@1:1
           version: 2.07
           serial: DD56419883CF6
           capabilities: usb-2.10 scsi
           configuration: driver=uas maxpower=500mA speed=480Mbit/s

The NVMe box is running. It's indicator lights up when connected, The box is detected by lshw, the NVMe disk is detected on Windows 10 with device manager, but since the file system is ext4 (previous Ubuntu install on laptop was on it), it is not readable in drives list when browsing. That's fine and expected. The NVMe was first inside the laptop, but since I upgraded with a better one, thought to use this one as external disk. Not sure where I am wrong. The device is not visible when booting with Live-USB or when trying to install an OS. I will be buying the USB 3 cable to increase speed... Any help appreciated.

Trying to run cron jobs with lynx fails. I get this error:

lynx: relocation error: /usr/lib/x86_64-linux-gnu/libgnutls.so.30: symbol _idn2_punycode_decode version IDN2_0.0.0 not defined in file libidn2.so.0 with link time reference

This is new after some recent updates. Anyone else experiencing this? Ideas how to solve? No new updates present.

Linux version 4.15.0-62-generic (buildd@lcy01-amd64-024) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~**18.04.1**)) #69-Ubuntu SMP Wed **Sep 4 20:55:53 UTC 2019**

I have Thunar 1.6.3 but dual pane (comes up with F3 in nautilus) does not work. How do I enable it? I only have tabs!?

Running UbuntuStudio 14.04

Thunar has "Open terminal here" option just like nautilus when you install "nautilus-open-terminal" package. My problem is it does not work when I connect to sftp. I need this very often. How do I enable it?

Using UbuntuStudio 14.04.