I have Ubuntu Server 18.04 LTS. I want to suppress kernel messages shown on console during boot. (The type of
[0.1234] kernel message thing that floods the screen ).
THIS DID NOT WORK:
- Changing /etc/systl.conf
/etc/systemd/system.conf. This did in fact remove
[ ok ] Blah blahtype of messages but not
[123.456] Something somethingtype.
- Changing GRUB settings. Even
GRUB_CMDLINE_LINUX_DEFAULT="quiet loglevel=3 rd.systemd.show_status=auto rd.udev.log-priority=3 loglevel=0"(source). No, difference in
loglevel=3. No, I did not forget to run
sudo dmesg -n 1(source)
- This,too. Don't mark this question as duplicate of that since
agettyis completely unrelated to boot messages and OP's own answer does not work, like I mentioned above about
/etc/default/grub( source )
- I removed
plymouthcompletely – the messages still appear. Which also makes sense since it's not related to plymouth, it's not even started as service in systemd, and there's no GUI on this system.
I'll probably be offering a bounty to the answer that can make a perfectly quiet boot setting and maybe downvote all those other answers because they're outdated and not useful at all and don't work at all. I've spent quite a considerable time on trying to figure this out with not much results.