https://wiki.padix.dk/ 2026-05-31T09:30:21+00:00 https://wiki.padix.dk/ https://wiki.padix.dk/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-06-10T19:19:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.padix.dk/doku.php?id=system:apt&rev=1654881549&do=diff Unattended upgrades Email From Add the following line in 50unattended-upgrades Unattended-Upgrade::Sender "Unattended-upgrades Example <noreply@example.com>"; Automatic reboot Uncomment the following lines in 50unattended-upgrades and change accordingly text/html 2022-06-10T19:19:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.padix.dk/doku.php?id=system:automatic_updates&rev=1654881549&do=diff Automatic Updates Redhat 8 / Rocky Add epel-release dnf install epel-release -y Install dnf-automatic dnf install dnf-automatic -y Enable systemctl enable --now dnf-automatic.timer Debian / Ubuntu Install package apt install unattended-upgrades text/html 2022-06-10T19:19:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.padix.dk/doku.php?id=system:centos_7_runlevels&rev=1654881549&do=diff Get current boot runlevel systemctl get-default Default boot to graphical interface systemctl set-default graphical.target Default boot to command line systemctl set-default multi-user.target text/html 2022-06-10T19:19:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.padix.dk/doku.php?id=system:cron&rev=1654881549&do=diff Crontab Problem: Email From Address When setting up the crontab it's possible to define a MAILTO address, however it's not possible to define a from address. Especially gmail will complain about a from address reading 'root@mail.example.com' To work around this problem it's necessary to move the functionality to external scripts instead. letsencrypt has been used as an example but the same can be done for other recurring tasks. text/html 2022-06-10T19:19:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.padix.dk/doku.php?id=system:mdadm&rev=1654881549&do=diff Monitoring The service mdmonitor will fail to run unless an email address is present in /etc/mdadm.conf MAILADDR receiver@example.com MAILFROM noreply@example.com The from address is not really necessary, but will prevent the email to show only text/html 2022-06-10T19:19:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.padix.dk/doku.php?id=system:zfs&rev=1654881549&do=diff ZFS install Ubuntu On ubuntu based systems after 16.04 it's enough to run apt install zfsutils-linux for zfs support to be installed. Mint The same as Ubuntu. Centos7 <https://github.com/zfsonlinux/zfs/wiki/RHEL-and-CentOS> Add module to autoload by creating file /etc/modules-load.d/zfs.conf with content