======OS - Linux - Distributions - Ubuntu - Notes======

=====Add alias IP addresses on NIC=====

Add an ethX:X interface definition to /etc/network/interfaces like so:
<code>
auto eth0
iface eth0 inet static
        address 10.0.1.5
        netmask 255.255.255.0
        network 10.0.1.0
        broadcast 10.0.1.255
        dns-nameservers 10.0.1.10 10.0.2.10
        post-up route add -host 172.16.31.31 gw 10.0.1.252

auto eth0:1
iface eth0:1 inet static
        address 10.0.1.6
        netmask 255.255.255.128
</code>
// The example also includes a specific host-route in the 'post-up' line. //

Now bring both interface online separately:
<code>
sudo ifdown eth0
sudo ifup eth0
sudo ifdown eth0:1
sudo ifup eth0:1
</code>

See: \\
[[https://wiki.debian.org/NetworkConfiguration#Multiple_IP_addresses_on_one_Interface|Debian - Networkconfiguration - Multiple IP addresses on one Interface]] \\
[[http://askubuntu.com/questions/548940/add-static-route-in-ubuntu-14-04|Ask Ubuntu - Add static route in Ubuntu 14.04 [duplicate]]] \\

=====Update older releases=====
Updates for older releases are found on <countrycode>.archive.ubuntu.com and security.ubuntu.com but will be removed from there when newer releases are made.

To update an Ubuntu release that has been removed from archive.ubuntu.com and security.ubuntu.com open your /etc/apt/sources.list and replace occurences of archive.ubuntu.com and security.ubuntu.com with:<code>old-releases.ubuntu.com</code>

Source: [[http://askubuntu.com/questions/805523/apt-get-update-for-ubuntu-10-04|Ask Ubuntu: apt-get update for ubuntu 10.04 [on hold]]] \\