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--- technical:26.04_ultimate_ubuntu_server_install [2026/06/08 22:55] – mark_scottworld.net
+++ technical:26.04_ultimate_ubuntu_server_install [2026/06/08 23:00] (current) – [Network Interface Configuration (Netplan)] mark_scottworld.net
@@ Line 68: / Line 68: @@
 </code>
+You can edit the disk partitions before submitting to add further disks at specific mount points.
+Mount points used were.. (which in this case were manually configured as I did not want to lose existing data)
+Prolong the life of SSDs with
+  nano /etc/sysctl.d/local.conf
+And add this line
+  vm.swappiness=20
+Make live with
+  systemctl restart procps.service
+You can check it is applied with
+  cat /proc/sys/vm/swappiness
+===== Allow IP routing internally =====
+  nano /etc/sysctl.d/local.conf
+Add the following line.
+  net.ipv4.ip_forward=1
+Then to load this restart the procps service...
+  systemctl restart procps.service
+===== Network Interface Configuration (Netplan) =====
+Configure a network bridge to present a single interface to the world, this is handy for VMs / VPNs etc. as we only need to reference the bridge. (br0:) - and means we can swap the network interface out without changing all the apps. 26.04 uses netplan to configure its network configuration.
+The following steps will set up a bridge with a static IP address. The interface is br0
+Change to the netplan directory.
+NOTE: You may need to set the DNS server to be the local router - until you have set up BIND, then you can go back and edit this again.
+  cd /etc/netplan
+  nano 00-solaris.yaml  (default netplan config)
+Content of the 00-solaris.yaml
+<code>
+# This is the network config made for solaris
+network:
+  version: 2
+  renderer: networkd
+  ethernets:
+    en01: {}
+  bridges:
+    br0:
+      critical: true
+      dhcp4: false
+      addresses: [ 10.3.200.1/16 ]
+      routes:
+       - to: default
+         via: 10.3.1.1
+      nameservers:
+        search: [ scottworld.net ]
+        addresses: [ 10.3.200.1 ]
+      interfaces: [ en01 ]
+      parameters:
+        stp: false
+      # Disable IPv6
+      dhcp6: false
+      accept-ra: no
+      link-local: []
+</code>
+Disable the cloud network configuration.
+  touch /etc/cloud/cloud-init.disabled
+You can check it with
+  cloud-init status
+Update the permissions on the netplan config to remove the global r/w permissions
+  chomd 600 /etc/netplan/00-solaris.yaml
+Apply the changes
+  netplan --debug apply
+Reboot and check the network configuration with
+  ip addr
+You should have an interface of br0: with the ip you specified.
+<code>
+: 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 noprefixroute
+       valid_lft forever preferred_lft forever
+: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP group default qlen 1000
+    link/ether 52:54:00:eb:cb:22 brd ff:ff:ff:ff:ff:ff
+    altname enx525400ebcb22
+: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
+    link/ether e2:d0:4d:d7:1f:0d brd ff:ff:ff:ff:ff:ff
+    inet 10.3.200.10/16 brd 10.3.255.255 scope global br0
+       valid_lft forever preferred_lft forever
+</code>
+Edit the file
+  nano //etc//hosts
+Comment out the entry for 127.0.1.1 and replace it with a Global server value.
+.3.200.1 solaris.scottworld.net solaris