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tech:linux:bionic [2019/08/11 06:26] (current)
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 +====== Notes about Bionic Beaver, Ubuntu LTS 18.01 ======
 +===== Disable cloud-init =====
 +<code bash>
 +sudo touch /​etc/​cloud/​cloud-init.disabled
 +sudo echo "​network:​ {config: disabled}"​ > /​etc/​cloud/​cloud.cfg.d/​99-disable-network-config.cfg
 +</​code>​
 +Also update this
 +<​code>​
 +FCheck for the existence of /​etc/​cloud/​cloud.cfg configuration. If the file exists edit the file and change the settings within:
 +FROM:
 +preserve_hostname:​ false
 +TO:
 +preserve_hostname:​ true
 +</​code>​
 +
 +===== Hostname Chage =====
 +<code bash>
 +sudo hostnamectl set-hostname NEWHOSTNAME
 +</​code>​
 +
 +===== Network configuration (multiple networks) =====
 +In this case a Bridge network on 192.168.1.1/​24 and a host-only network on 192.168.56.1/​24. ​ Most important is the absence of the gateway4 line in the host-only network to ensure internet traffic goes via 192.168.1.1 gateway.
 +<​code>​
 +network:
 +    version: 2
 +    renderer: networkd
 +    ethernets:
 +        enp0s3:
 +            dhcp4: no
 +            addresses: [192.168.1.60/​24]
 +            gateway4: 192.168.1.1
 +            nameservers:​
 +              addresses: [8.8.8.8,​192.168.1.1]
 +              search: [ example.org ]
 +        enp0s8:
 +            dhcp4: no
 +            addresses: [192.168.56.60/​24]
 +
 +</​code>​
 +
 +Routing table output
 +<​code>​
 +Kernel IP routing table
 +Destination ​    ​Gateway ​        ​Genmask ​        Flags Metric Ref    Use Iface
 +0.0.0.0 ​        ​192.168.1.1 ​    ​0.0.0.0 ​        ​UG ​   0      0        0 enp0s3
 +192.168.1.0 ​    ​0.0.0.0 ​        ​255.255.255.0 ​  ​U ​    ​0 ​     0        0 enp0s3
 +192.168.56.0 ​   0.0.0.0 ​        ​255.255.255.0 ​  ​U ​    ​0 ​     0        0 enp0s8
 +</​code>​
  

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