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Martin Hope
Thomas Aichinger
Asked: 2022-10-11 09:14:30 +0800 CST
  • 0

I have a linux computer (Ubuntu 22.04) with 2 interfaces both on different VLAN's. One interface should be default gateway via ipv4 and the other interface should connect via ipv6.

This is my configuration

network:
   version: 2
   ethernets:
      wan:
         match:
            macaddress: fa:a1:d2:cd:8b:35
         set-name: wan
         addresses:
         - 2000:3000::d17/48
         dhcp4: false
         dhcp6: false
         accept-ra: false
      vpn:
         match:
            macaddress: fa:08:df:79:9b:b5
         set-name: vpn
         addresses:
         - 172.29.1.17/24
         dhcp4: false
         dhcp6: false
         routes:
         - to: 172.29.29.0/24
           via: 172.29.1.1
         nameservers:
            addresses:
            - 1.1.1.1



ip -6 route
2000:3000::/48 dev wan proto kernel metric 256 pref medium
fe80::/64 dev vpn proto kernel metric 256 pref medium
fe80::/64 dev wan proto kernel metric 256 pref medium


ip -6 neighbour
fe80::c6aa:bbcc:fe48:4681 dev wan lladdr aa:bb:cc:48:46:81 router STALE
2000:3000::1 dev wan lladdr aa:bb:cc:48:46:81 router STALE

The ipv6 gateway should be

ping -6 2000:3000::1
PING 2000:3000::1(2000:300::1) 56 data bytes
64 bytes from 2000:3000::1: icmp_seq=1 ttl=64 time=0.727 ms
64 bytes from 2000:3000::1: icmp_seq=2 ttl=64 time=0.278 ms

This works fine for the VPN interface but WAN ipv6 does not have a route, so I can't reach it from outside via ipv6. How can I add a route?

networking
Martin Hope
Thomas Aichinger
Asked: 2022-09-28 21:33:04 +0800 CST
  • 0

I run Ubuntu 22.04.1 and as I login as root there is a message saying

2 updates can be applied immediately.

When I look at upgadeables, I get:

apt list --upgradable
libnss-systemd/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
libpam-systemd/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
libsystemd0/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
libudev1/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
systemd-sysv/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
systemd/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
udev/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]

But when I do apt upgrade nothing happens:

apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libnss-systemd libpam-systemd libsystemd0 libudev1 systemd systemd-sysv udev
0 upgraded, 0 newly installed, 0 to remove and 7 not upgraded.

Why are these packages are kept back?

And how do I overcome this?

upgrade
Martin Hope
Thomas Aichinger
Asked: 2022-05-27 05:13:36 +0800 CST
  • 4

I newly installed Ubuntu 22.04 and configured netplan like this:

network:
    version: 2
    ethernets:
        ens18:
            addresses:
            - 10.10.0.101/24
            - 2009:470:1099:10::101/64
            dhcp4: false
            dhcp6: false
            accept-ra: false
            gateway4: 10.10.0.1
            gateway6: 2009:470:1099:10::1
            nameservers:
                addresses:
                - 8.8.8.8
                - 2001:4860:4860::8888

After boot I get this warning

** (generate:1099): WARNING **: 15:10:35.646: `gateway4` has been deprecated, use default routes instead.
    See the 'Default routes' section of the documentation for more details.
** (generate:1099): WARNING **: 15:10:35.646: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.

How to get rid of this warning?

networking
Martin Hope
Thomas Aichinger
Asked: 2021-12-22 00:14:22 +0800 CST
  • -1

I have a private Zerotier SD-WAN (10.99.99.0/24). Some of my clients also use a local net 192.168.0.0/24. And there is also a network printer with 192.168.0.101.

Since Zerotier does not have a client for this printer my question is: How can I make this printer available in the Zerotier network (10.99.99.0/24). So that I can use it from all my Zerotier clients.

Here is the network config of such a client:

1: lo: <LOOPBACK,UP,LOWER_UP> 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

4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:21:60:7b:ed:1b brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.211/24 brd 192.168.0.255 scope global vmbr0
       valid_lft forever preferred_lft forever
    
22: zt7zkupgbd: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2800 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether 00:33:17:aa:f8:f8 brd ff:ff:ff:ff:ff:ff
    inet 10.99.99.211/24 brd 10.99.99.255 scope global zt7zkupgbd
       valid_lft forever preferred_lft forever
networking
Martin Hope
Thomas Aichinger
Asked: 2021-10-14 05:28:49 +0800 CST
  • 1

I have some files in a ZFS pool.

zpool list
NAME   SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
ZFS   7.27T  4.03G  7.26T        -         -     0%     0%  1.00x    ONLINE  -


zfs list
NAME                USED  AVAIL     REFER  MOUNTPOINT
ZFS                66.0G  7.08T       96K  /ZFS
ZFS/file1          66.0G  7.14T     1.62G  -
ZFS/file2          66.0G  7.14T       22K  -

But /ZFS dir (mountpoint) is empty.

ls -la /ZFS
total 5
drwxr-xr-x  2 root root    2 Oct  8 12:02 .
drwxr-xr-x 19 root root 4096 Oct 13 12:40 ..

I want to copy these files to another disk (sdc1 on the same computer) with ext4.

How to do that?

zfs
Martin Hope
Thomas Aichinger
Asked: 2021-09-15 17:27:22 +0800 CST
  • 0

I want to change the hostname of a Ubuntu 18.04 server.

I did:

hostnamectl --set-hostname newname --static
changed /etc/hostname file to newname
changed /etc/hosts file to newname
rm -f /etc/machine-id
dbus-uuidgen --ensure=/etc/machine-id
dbus-uuidgen --ensure
dpkg-reconfigure openssh-server

Finally I did a reboot. But after reboot there is still the old hostname. The file /etc/hostname has been changed to the old hostname.

How to permanently change the hostname?

18.04
Martin Hope
Thomas Aichinger
Asked: 2021-07-10 03:43:21 +0800 CST
  • 0

I use Ubuntu 20.04.2, fresh install. I have a /29 public network x.x.x.80/29

When I set my IP to x.x.x.83 everything works fine. As soon I set my IP to x.x.x.82 I can not use apt update.

Here the error:

apt update Err:1 http://ch.archive.ubuntu.com/ubuntu focal InRelease Could not connect to ch.archive.ubuntu.com:80 (2001:1620::1620), connection timed out Could not connect to ch.archive.ubuntu.com:80 (109.202.202.202), connection timed out

I also tried to change the archive to de.archive.ubuntu.com - same situation

But traceroute ch.archive.ubuntu.com works:

Has anyone an idea how to fix that?

networking
Martin Hope
Thomas Aichinger
Asked: 2020-12-08 12:44:12 +0800 CST
  • 2

I run several virtual ubuntu machines on a proxmox server. They all have a single disk without LVM. When disk space runs out I poweroff the virtual machine, then enlarge the partition, mount gparted ISO, boot from this ISO, resize the partition, and boot the vm again.

Now I wonder if there is a simpler way without rebooting the virtual machine.

partitioning virtualization
Martin Hope
Thomas Aichinger
Asked: 2020-11-23 13:47:16 +0800 CST
  • 1

As I read most of the cloud-init documentation and watched some youtube videos about cloud-init I am still confused about how to use this software.

Can someone help me understand?

As I understood so far cloud-init should configure a linux machine (instance) from outside, so that I dont have to login manually and configure e.g. disk setup, network, users, and so on...

Now I have first use case. A physical computer with an empty hard-disk and I want to install ubuntu on it without manual interaction using cloud-init. How can this be archived?

Or another use-case: I run proxmox (kvm) on debian and want to create an new vitrual machine running ubuntu.

Does anyone know how to do that?

cloud-init
Martin Hope
Thomas Aichinger
Asked: 2020-11-03 11:06:34 +0800 CST
  • 0

I set up a new ubuntu 20.04 server and installed BIND 9.16.1-Ubuntu. Then I copied the bind configuration from my old ubuntu 16.04.7 running BIND 9.10.3-P4-Ubuntu.

When I try to start bind on the new server I get this error.

/etc/bind/named.conf.options:15: '::1/64': address/prefix length mismatch '64'

Here is my /etc/bind/named.conf.options file.

options {
        directory "/var/cache/bind";
        dnssec-validation auto;
        auth-nxdomain no;

        dump-file "/var/cache/bind/named_dump.db";
        statistics-file "/var/cache/bind/named.stats";

        listen-on port 53 { 0.0.0.0/0; };
        listen-on-v6 port 53 { any; };
        allow-query { 0.0.0.0/0; ::/0; };
        version "DNS";

        allow-recursion {
                127.0.0.0/8;            ::1/64;
                10.10.0.0/24;           1000:1000:1000:1000::/56;
        };

        allow-transfer {
                127.0.0.1;              ::1;
        };

        disable-empty-zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa";

        notify yes;
        masterfile-format text;
};

What is wrong with this prefix?

What has changed in bind 9.16 cause same file works perfect with bind 9.10?

networking bind
Martin Hope
Thomas Aichinger
Asked: 2020-08-18 07:58:24 +0800 CST
  • 0

I have installed owncloud 10.4 with the owncloud repository.

When I do a

apt update
apt upgrade

I get a message with release upgrade has to be accepted.

N: Repository 'https://download.owncloud.org/download/repositories/production/Ubuntu_18.04  Release' changed its 'Origin' value from 'obs://s2.owncloud.com/ce:10.3/Ubuntu_18.04' to 'obs://s2.owncloud.com/ce:10.5/Ubuntu_18.04'
N: Repository 'https://download.owncloud.org/download/repositories/production/Ubuntu_18.04  Release' changed its 'Label' value from 'ce:10.3' to 'ce:10.5'

How can I fix this?

repository apt owncloud-server
Martin Hope
Thomas Aichinger
Asked: 2020-05-24 00:31:13 +0800 CST
  • 60

I just installed a new Ubuntu 20.04 server as a virtual machine on an esx-Server. When I look into systemlog I see lots of multipath entries.

multipathd[651]: sda: add missing path
multipathd[651]: sda: failed to get udev uid: Invalid argument
multipathd[651]: sda: failed to get sysfs uid: Invalid argument
multipathd[651]: sda: failed to get sgio uid: No such file or directory
multipathd[651]: sda: add missing path
multipathd[651]: sda: failed to get udev uid: Invalid argument
multipathd[651]: sda: failed to get sysfs uid: Invalid argument
multipathd[651]: sda: failed to get sgio uid: No such file or directory

I think multipath is just not configured and my question is if I can disable multipath. Since I checked this on several Ubuntu 20.04 servers multipath is enabled by default.

Does it make sense to activate multipath?

server 20.04 multipath
Martin Hope
Thomas Aichinger
Asked: 2019-12-28 04:04:53 +0800 CST
  • 0

Is there a possibility to install ubuntu server without asking further questions.

I want to be asked for installation details (username, password, a.s.o.) at the beginning of the installation process, and no more further questions during the rest of installation.

If you have to install several servers a day it is quite annoying to give an answer, wait a minute, give next answer and wait another minute.

I would love to do that at the beginning of installation, and then have time to do some other things.

system-installation server
Martin Hope
Thomas Aichinger
Asked: 2018-08-10 04:21:34 +0800 CST
  • 9

I have

Welcome to Ubuntu 16.04.5 LTS (GNU/Linux 4.15.0-24-generic x86_64)

15 packages can be updated.
7 updates are security updates.

I watched this several weeks and tried so many things to fix it, but I cant get it run. Unattended-upgrades do not upgrade my server.

I installed

# apt-get install unattended-upgrades
Reading package lists... Done
Building dependency tree
Reading state information... Done
unattended-upgrades is already the newest version (0.90ubuntu0.9).
0 upgraded, 0 newly installed, 0 to remove and 9 not upgraded.

# apt-get install apt-listchanges
Reading package lists... Done
Building dependency tree
Reading state information... Done
apt-listchanges is already the newest version (2.85.14ubuntu1).
0 upgraded, 0 newly installed, 0 to remove and 9 not upgraded.

This is my /etc/apt/apt.conf.d/10periodic

APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::AutocleanInterval "7";
APT::Periodic::Unattended-Upgrade "1";

This is my /etc/apt/apt.conf.d/50unattended-upgrades

Unattended-Upgrade::Allowed-Origins {
        "${distro_id}:${distro_codename}";
        "${distro_id}:${distro_codename}-security";
        "${distro_id}ESM:${distro_codename}";
        "${distro_id}:${distro_codename}-updates";
};

Unattended-Upgrade::Package-Blacklist {
        "open-vm-tools";
};

Unattended-Upgrade::AutoFixInterruptedDpkg "true";
Unattended-Upgrade::MinimalSteps "true";
Unattended-Upgrade::InstallOnShutdown "true";
Unattended-Upgrade::Mail "root";
Unattended-Upgrade::MailOnlyOnError "true";
Unattended-Upgrade::Remove-Unused-Dependencies "true";
Unattended-Upgrade::Automatic-Reboot "true";
Unattended-Upgrade::Automatic-Reboot-Time "07:00";
Acquire::http::Dl-Limit "0";

This is what I have in log-file /var/log/unattended-upgrades/unattended-upgrades.log

INFO Initial blacklisted packages: open-vm-tools
INFO Initial whitelisted packages:
INFO Starting unattended upgrades script
INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial', 'o=Ubuntu,a=xenial-updates']
INFO Initial blacklisted packages: open-vm-tools
INFO Initial whitelisted packages:
INFO Starting unattended upgrades script
INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial', 'o=Ubuntu,a=xenial-updates']

Does anyone have a clue what is wrong?

upgrade unattended-upgrades
Martin Hope
Thomas Aichinger
Asked: 2018-03-26 12:13:09 +0800 CST
  • 23

I installed Ubuntu 17.10 with latest updates on a vmware virtual machine. Netplan does not configure my 2 ethernets.

Here is my /etc/netplan/01-netcfg.yaml

network:
  version: 2
  renderer: networkd
  ethernets:
    lan:
      match:
        macaddress: 00:12:34:a8:29:e8
      set-name: lan
      dhcp4: false
      dhcp6: false
      accept-ra: false
      addresses:
        - 10.10.0.48/24
        - 1701:5740:5000:3301::48/64

    failover:
      match:
        macaddress: 00:45:57:89:27:e8
      set-name: failover
      dhcp4: false
      dhcp6: false
      accept-ra: false
      addresses:
        - 17.25.111.30/27
        - 1701:5740:5000:3300::30/64
      gateway4: 17.25.111.1
      gateway6: 1701:5740:5000:3300::1

      nameservers:
        search:
          - example.at
          - intern.example.at
        addresses:
          - 10.10.0.1
          - 1701:5740::66

I switched back to predictable devices like eth0, and after boot all devices are named properly, but not configured.

1: lo: <LOOPBACK,UP,LOWER_UP> 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: lan: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:12:34:a8:29:e8 brd ff:ff:ff:ff:ff:ff
3: failover: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:45:57:89:27:e8 brd ff:ff:ff:ff:ff:ff

After login and fireing systemctl restart systemd-networkd devices are configured. netplan apply also does the job.

I played so much around with systemd-networkd.service and systemd-networkd.timer but nothing helped.

It is quite frustrating set up the network manually after each reboot. Does anyone know how to solve this?

networking systemd netplan