r00ty

I think the effect produced by the strobing due to DC rectification is markedly different. That produced a gapping when moved (since the LED is off during some parts of the movement and on for others). The effect when there's a somewhat brighter light source around a darkened room is very different where the lighter source seems to move independently of the object it is attached to, with no stuttering/strobe effect present.

The independent movement effect is much more likely due to response time differences. I thought I'd take a look and see. This https://www.nature.com/articles/s41598-018-34073-8 article by nature does mention there is a response time difference. However the vast majority of the paper seems to be about the effects on cone response time due to lack of calcium and other cone specific testing.

This https://pmc.ncbi.nlm.nih.gov/articles/PMC2063471/ article seems to imply that there's a 20ms lag for rod reaction time. Where they tested people's reactions to both kinds of stimuli and measured the response times.

Windows is a strange game. It seems the only winning move is not to play.

Same thing happens with those old alarm clocks with LED 7 segment displays.

I think it's the difference between rods and cones on the retina. Rods are more sensitive to light but do not see colour. That's what you use in the dark. I suspect they are also slower to react to light (probably because they need to gather enough over time to make an image). So since the lighter text is bright enough to be seen by the cones, the reaction time is quicker so it looks like it's moving independently.

Anyway that's my theory and I'm sticking to it. :P

The big websites are operating on ipv6. If you want to run your own website it's actually trivial to host it on both ipv4/ipv6 now and most good hosting providers will give you a /64 allocation.

In the UK broadband providers also are quite commonly providing IPv6 as standard (albeit the scummy ones dynamically assign a prefix, for absolutely zero reason aside from annoyance). My provider uses PD to assign a /48 even.

So, really not sure why it's so slow going elsewhere. There's really no reason for it now in 2025.

Can you imagine that much RA/ND chatter? Would need some serious capacity.

I think his unrealistic 24 hour plan was to give putin what he thought he wanted. Eg all the territory he's captured so far and assurances against nato action/withdrawal of some western personnel at nato border country bases. You know putin's public story.

He just didn't know putin's real objective. Maybe now he's getting a bit of an idea. He's too simplistic to fathom that there could have been an ulterior motive.

I never heard that. But it seems entirely believable.

It's for backup purposes mainly. A lot of cloud backup providers don't store permissions.

So if I restore the data I can then restore the permissions after. So these are the folders I am backing up (with some exceptions in /var)

OK so it's fairly simple. You need to install the acl package (or whatever equivalent package contains getfacl/setfacl. Then you can use that to dump the data from an entire structure into a file (I also then bzip that). Then I backup all installed packages to help with a restore too.

So the script looks like:

#!/bin/bash
cd /etc
/usr/bin/getfacl -R . | /usr/bin/bzip2 -9 >PERMISSION_BACKUP.bz2
chmod 600 PERMISSION_BACKUP.bz2
cd /home
/usr/bin/getfacl -R . | /usr/bin/bzip2 -9 >PERMISSION_BACKUP.bz2
chmod 600 PERMISSION_BACKUP.bz2
cd /root
/usr/bin/getfacl -R . | /usr/bin/bzip2 -9 >PERMISSION_BACKUP.bz2
chmod 600 PERMISSION_BACKUP.bz2
cd /var
/usr/bin/getfacl -R . | /usr/bin/bzip2 -9 >PERMISSION_BACKUP.bz2
chmod 600 PERMISSION_BACKUP.bz2
/usr/bin/apt list --installed | /usr/bin/bzip2 -9 >/root/INSTALLED-PACKAGES.bz2
chmod 600 /root/INSTALLED-PACKAGES.bz2

To restore you change to the folder the backup was taken from, unbzip the file (or uncompress live via pipe) and use setfacl --restore=

Yeah. Only on my phone right now but will get it and post here later/tomorrow.

I mean, too late for you now. But I have a script that backs up just the permissions and owners for a given folder hierarchy.

I use it because I backup to a cloud backup platform that doesn't save them. So these files are backed up with the data so the files and permissions/owners can be restored in an emergency.

But you could of course also use the file to restore permissions after a user generated mistake too.

Pretty sure one of the first things musk did was kill off an entire (or more than one?) data centre. Pointing out with glee that it worked fine without it.

This is probably why it existed.

Still it's only twitter. No real loss.