If the Maildir on a Plesk server gets mangled, the file “maildirsize” in the user’s mail directory may get out of sync. There are many knowledge base articles out there that claim to solve the problem – but the only real cure that I found so far is described at https://support.plesk.com/hc/en-us/articles/12377321189527-Usage-statistics-of-a-mailbox-are-not-accurate-in-the-Mail-Accounts-section-of-a-Plesk-domain. It boils down to …

Continue reading ‘Plesk and the maildirsize file’ »

Bei Plesk Obsidian Web Admin Edition 18.* werden die Subscription-Mailbox Quotas nicht immer richtig im UI angezeigt. Das kann zu Verwirrung führen. Die richtigen Werte können mittels Plesk CLI ermittelt werden: plesk db “SELECT concat(mail.mail_name,’@’,domains.name) AS ‘Email address’,mn_param.val AS ‘Mailbox usage’,Limits.value AS ‘Mailbox limit’ FROM mail LEFT JOIN mn_param ON mail.id=mn_param.mn_id LEFT JOIN domains ON …

Continue reading ‘Mailbox Quota einsehen und ändern bei Plesk’ »

Sometimes, VESA buffer cannot properly auto-detect the resolution of your screen during boot-up. You may set the VGA/VESA resolution there using grub. To fix it, open /etc/default/grub in an editor # Adjust the following lines: # see also https://askubuntu.com/a/609523 # GRUB_GFXMODE=1280x1024x32 # GRUB_GFXPAYLOAD_LINUX=keep sudo update-grub

Also Ubuntu Server supports running an X11 desktop environment. For installing this after your initial Ubuntu installation routine, use the following set of commands: $ sudo apt-get install tasksel $ sudo tasksel To also make Ubuntu boot into your X11 desktop environment by default, use the following command: sudo systemctl set-default graphical.target

Ubuntu servers are not configured out-of-the box to prevent going to sleep mode. NetworkManager might announce this with “sleep requested”. After a millisecond-long nap, the network cards may not be coming up properly

Mit Anacron ist es möglich, zuverlässig (auch wenn der Rechner über Nacht nicht gelaufen sein sollte) Jobs periodisch (d.h. mit einer Kadenz von einem Tag oder mehr) einzuplanen. Anacron wird standardmäßig von Ubuntu und Debian installiert. Seit der Umstellung auf systemd hat sich aber die Art der Ausführung von solchen Jobs geändert. Sie werden zwar …

Continue reading ‘Debian/Ubuntu: Anacron/cron.daily läuft zur falschen Uhrzeit’ »

The article gives hints on how to properly re-adjust the Debian configuration, if both Plesk (with BIND/Named) and PowerDNS are installed. It addresses the error message “Failed at step ADDRESS_FAMILIES spawning”.