Using a Read-Only Persistence Capability in Knoppix LiveUSBs

[Blacksimon]

Greetings, Utu.
in my case:
options --exclude *gvfs* prevents the error messages to complete KNOPPIX1 creation options --exclude *cache* is to reduce size of KNOPPIX1
I had already set up by default to move cromium cache, ~/.thumbnails, proxy cache to ramdisk.
option -iso-level 4 is to prevent file/directory name truncation as you can see at the beginning of the process of mkisofs.

cd /
sudo mkisofs --exclude *gvfs* --exclude *cache* -iso-level 4 -R -U KNOPPIX-DATA | create_compressed_fs -B 131072 -m - - > /mnt-system/KNOPPIX/KNOPPIX1

I'm testing KNOPPIX1 without overlay at the moment and everything goes well.
The size of KNOPPIX1 is only 720MB instead of 3GB overlay (2GB really used)
With KNOPPIX1 ramdisk is used by default by knoppix

[utu]

option -iso-level 4 is to prevent file/directory name truncation

Interesting.
I haven't noticed this as a problem, but I may have just been lucky.

FWIW, I often write things back to /tmp first just to see how things are turning out.

[utu]

I had already set up by default to move cromium cache, ~/.thumbnails, proxy cache to ramdisk.

This also interesting.
I had been establishing or re-establishing a reiserfs r/w persistence.
An alternative might be to use the ramdisk as a temporary r/w (in ram) for
some functions like *[Cc]ache* files.
I assume if I use the cheatcode noimage and forget my reiserfs that sets this up.
Not sure how to go about the re-routing of caches, however.

[Blacksimon]

To move cromium cache in ramdisk you have to use

/usr/bin/chromium %U --disk-cache-dir="/ramdisk"

right click on Menu/Internet/Browser web Chromium to change property or modify the Exec line in /home/knoppix/.local/share/application/Browser web Chromium.desktop file

To move ~/.thumbnails in ramdisk you have to add in /etc/init.d/knoppix-autoconfig at line 739 (function start_fs) this code

[ -d /home/knoppix/.thumbnails ]  || mkdir /home/knoppix/.thumbnails
mount -t tmpfs -o rw,size=200M,suid,dev tmpfs /home/knoppix/.thumbnails

I think you can use even other directory

[utu]

To move cromium cache in ramdisk you have to use...

The chromium cache is already in ramdisk, operating without persistence. See

updatedb; locate *[Cc]ache* | grep chromium

after booting with noimage and no prior re-arrangement of the cache.
This cache's current contents are probably lost on re-boot of course.