===== Ubuntu =====
[[:hobby]]

==== IPv6 ====
  - <code bash>bab2501@ns1:~$ sudo sysctl net.ipv6.conf.ens224.accept_ra
net.ipv6.conf.ens224.accept_ra = 1
bab2501@ns1:~$ sudo sysctl net.ipv6.conf.ens224.accept_ra_pinfo
net.ipv6.conf.ens224.accept_ra_pinfo = 1
bab2501@ns1:~$ sudo sysctl net.ipv6.conf.ens224.autoconf
net.ipv6.conf.ens224.autoconf = 1
bab2501@ns1:~$
</code>
  - <code bash>bab2501@ns1:~$ sudo cat /etc/sysctl.conf | grep net.ipv6
net.ipv6.conf.ens224.accept_ra = 1
net.ipv6.conf.ens224.accept_ra_pinfo = 1
net.ipv6.conf.ens224.autoconf = 1
#net.ipv6.conf.all.forwarding=1
#net.ipv6.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_source_route = 0
</code>

==== AutoPurge ====

  - <code bash>dpkg -l | awk '/^rc/ {print $2}' |xargs sudo dpkg --purge</code>((https://askubuntu.com/questions/181948/can-i-automatically-purge-every-package-ive-ever-uninstalled))
  - <code bash>sudo apt-get autoremove --purge</code>

==== Old Upgrade ====
<code>
cp  /etc/apt/sources.list /etc/apt/sources.list.bak
    sudo sed -i -re 's/([a-z]{2}\.)?archive.ubuntu.com|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list
</code>
===== LXD =====
https://www.cyberciti.biz/faq/install-lxd-on-ubuntu-20-04-lts-using-apt/