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A message with no SPF, DKIM, or DMARC records is not rejected by rule. Receivers log a 'none' result and fall back to local policy, which may accept, spam-folder, or refuse the mail.
Read MoreA VirtualBox bug leaves multi-vCPU UEFI guests frozen on a black screen when Hyper-V runs on the Windows host. One VBoxManage command works around it, or you can disable Hyper-V to restore full-speed virtualization.
Read MoreBoth accounts hold full privileges, but the built-in Administrator skips UAC entirely while your own admin account must elevate. Here's how to tell them apart and which to use.
Read MoreA greedy .*: prefix drags grep's lazy match to the second "image data" in file output. Anchor with \A and one lazy quantifier, or switch to file --mime-type for stable, scriptable results.
Read MoreExcel stores the last values it retrieved from external workbook links inside the file, so deleted sources keep displaying stale numbers. Refresh or remove the link, or turn off "Save external link values".
Read MoreGNOME's screen lock suspends the remote desktop listener, so screen sharing fails until someone unlocks the machine locally. Disable the automatic lock or allow locked remote desktop to stay connected.
Read MoreAfter upgrading Ubuntu, GNOME Files (Nautilus) shows relative dates like "Today 13:52" or "Last year" instead of real timestamps. One preference change — or one gsettings command — brings back absolute dates.
Read MoreA fresh Ubuntu install over an old one erases the system partition, but your other partitions survive only if you partition manually. This article explains what gets wiped, how to check before you click, and how to set u...
Read MoreA "No home directory" error after relocating /home means /etc/fstab has no entry mounting the new partition. Add the UUID line for the data disk, verify with mount -a, then reboot.
Read MoreTwo firmware bugs stop built-in wake on this laptop: a FACP power-button flag and a missing _PRW for the lid. Patch both with an early-initrd ACPI override — no BIOS flash needed.
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