Something you didn’t mention is how the overlay file system can extend the life of a SD card because it won’t have to write to it. This is super useful for embedded situations! I’m going to use this for a time lapse system I’m building.

Thanks for posting this. I've been thinking about this for a while myself.

Cool, we had all the Macintosh computers set like this at school, each time the students left the class the unit were refreshed ready for the next batch.

I've been using overlay on all my systems -- pi and otherwise. Helps to protect the integrity of the filesystem. I use it in conjunction with BTRFS snapshots. On a particular rasberry pi A, that has been in service since the A was a thing, used to have to have the filesystem restored at least once every 6 months from inproper shutdown/etc. After deploying this concept, it hasn't needed re-imaging (so 6+ years now?)

If you use an overlay file system then it's probably a good idea to designate another host in your network as a remote syslog server so that the Pi can still output syslog information that you can scrutinise if, say, something bad happens to the Pi. I assume a lot of people have "always on" NAS drives these days and those are ideal for setting up a remote syslog server on, if they are not so proprietary to stop you from setting one up in the first place. The configuration for remote syslog is, however, extremely straightforward to do.

the 80's called and they want their neon theme back

In task manager, under View uncheck "Show memory used by cache as free". Maybe it will show the memory that is being used by the temp files.

This is how the MX Live system works, or any "Live" system, for that matter. If you have persistence enabled, the session gets saved to ram, and "synced" to storage, if you choose to save the session. This is good for online shopping, or any situation where you don't want sensitive information, to be saved. it's strange to have that feature on an installed system.

df -h in terminal or command line would show disk spaces for each part, file manager global free space may mislead ...

I believe the files are logged and written to sd and with that not using ram.When you reset the pi the files are deleted (with help of the log). Also: does it works if you hard power down? (disconnect power)

At timestamp 5:22 the message "unable to flush /var/lib/dpkg/updates/tmp.1 after padding: No space lift on device" Is this the file that holds the local image that is discarded after reboot, rather than use the ram. If it is the the SD card is still been written to.

Raspberry Pi as a ThinClient?

so its like deepfreeze on windows

Great feature I didn't knew about this but it's not for me

you should check the swap file for the temporary memory that's being used, probably the Pi is using that instead of the RAM

Should work on Pi0 web scraping to emails; ie no file saving!

An overlay file system uses a file to store the added applications, not memory. But the changes are in a separate temporary file instead of the root file system. Also, you can change which desktop you are logged into without having to reboot. You just log out and log back in with a different desktop.

@charlesjensen6810

2 жыл бұрын

John, are you 100% it is not using RAM? Did you check? The scripts seems to use ramfs

@johngay8416

2 жыл бұрын

I didn’t check the script. I’m just commenting on my experience of using overlay file systems before. And based on his limited testing which showed that it wasn’t reducing the memory available. And the error when he over-filled the overlay file system.

Check the /etc/fstab file after you enable overlayfs.

Can anyone help me choose whether I should use 32 or 64 bit OS. I'm using a Raspberry Pi 4 2Gig RAM

@leepspvideo

2 жыл бұрын

Try 64bit. If you find it slow try Zram Great 64bit Ubuntu performance on 2GB Raspberry Pi 4 with Zswap, plus Ubuntu Freezing Fix. kzread.info/dash/bejne/hX2CmNiGZqudo7w.html

You don't want them beating your High Score... Hhahahahhaa :)

Does htop display the actual RAM usage???

@leepspvideo

2 жыл бұрын

Not sure, I didn’t try any others

It probably uses /dev/shm which is ram shared memory. Did you confirm that?

@DylanDurdle

2 жыл бұрын

Yes, by default

If doing that to retropie it's worth to remember that you'll also lose save states.

2 жыл бұрын

I was thinking the same about save files and save states

Hey what is the os he’s using at 7:56

@obvious_giraffe8386

2 жыл бұрын

Raspberry pi os with KDE ... sweet mars theme

@leepspvideo

2 жыл бұрын

My new Linux Desktop. Raspberry Pi 4. kzread.info/dash/bejne/ZWqmsdiqkampfNY.html

What happens when you try deleting something.

@leepspvideo

2 жыл бұрын

I didn’t try that.

@DylanDurdle

2 жыл бұрын

It will remove the file from view, but remount or reboot and the file will be back.

Problem will be that one can't save the game.

@leepspvideo

2 жыл бұрын

If you need to save a game you wouldn’t use this mode.

You are becoming old bcz you prefer larger task bar